Resolve GccTriple/ClangTriple early.

When these are Ninja variable they can't be used in android.Path since
they'll be rejected as invalid paths. We don't actually need them to be
a Ninja variable, so make them plain old strings instead.

Test: Still builds.
Change-Id: I04743cebd4b2f9be5685545f2ee941df180fce14

cc/arm64_device.go

@@ -94,8 +94,6 @@ func init() {
 	pctx.SourcePathVariable("arm64GccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/aarch64/aarch64-linux-android-${arm64GccVersion}")
 
-	pctx.StaticVariable("arm64GccTriple", "aarch64-linux-android")
-
 	pctx.StaticVariable("arm64Cflags", strings.Join(arm64Cflags, " "))
 	pctx.StaticVariable("arm64Ldflags", strings.Join(arm64Ldflags, " "))
 	pctx.StaticVariable("arm64Cppflags", strings.Join(arm64Cppflags, " "))
@@ -139,7 +137,7 @@ func (t *toolchainArm64) GccRoot() string {
 }
 
 func (t *toolchainArm64) GccTriple() string {
-	return "${arm64GccTriple}"
+	return "aarch64-linux-android"
 }
 
 func (t *toolchainArm64) GccVersion() string {
@@ -167,7 +165,7 @@ func (t *toolchainArm64) IncludeFlags() string {
 }
 
 func (t *toolchainArm64) ClangTriple() string {
-	return "${arm64GccTriple}"
+	return t.GccTriple()
 }
 
 func (t *toolchainArm64) ClangCflags() string {

cc/arm_device.go

@@ -161,8 +161,6 @@ func init() {
 	pctx.SourcePathVariable("armGccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/arm/arm-linux-androideabi-${armGccVersion}")
 
-	pctx.StaticVariable("armGccTriple", "arm-linux-androideabi")
-
 	pctx.StaticVariable("armToolchainCflags", strings.Join(armToolchainCflags, " "))
 	pctx.StaticVariable("armCflags", strings.Join(armCflags, " "))
 	pctx.StaticVariable("armLdflags", strings.Join(armLdflags, " "))
@@ -269,7 +267,7 @@ func (t *toolchainArm) GccRoot() string {
 }
 
 func (t *toolchainArm) GccTriple() string {
-	return "${armGccTriple}"
+	return "arm-linux-androideabi"
 }
 
 func (t *toolchainArm) GccVersion() string {
@@ -308,7 +306,7 @@ func (t *toolchainArm) InstructionSetFlags(isa string) (string, error) {
 }
 
 func (t *toolchainArm) ClangTriple() string {
-	return "${armGccTriple}"
+	return t.GccTriple()
 }
 
 func (t *toolchainArm) ToolchainClangCflags() string {

cc/mips64_device.go

@@ -95,15 +95,12 @@ func init() {
 	pctx.SourcePathVariable("mips64GccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/mips/mips64el-linux-android-${mips64GccVersion}")
 
-	pctx.StaticVariable("mips64GccTriple", "mips64el-linux-android")
-
 	pctx.StaticVariable("mips64Cflags", strings.Join(mips64Cflags, " "))
 	pctx.StaticVariable("mips64Ldflags", strings.Join(mips64Ldflags, " "))
 	pctx.StaticVariable("mips64Cppflags", strings.Join(mips64Cppflags, " "))
 	pctx.StaticVariable("mips64IncludeFlags", bionicHeaders("mips64", "mips"))
 
 	// Clang cflags
-	pctx.StaticVariable("mips64ClangTriple", "mips64el-linux-android")
 	pctx.StaticVariable("mips64ClangCflags", strings.Join(clangFilterUnknownCflags(mips64Cflags), " "))
 	pctx.StaticVariable("mips64ClangLdflags", strings.Join(clangFilterUnknownCflags(mips64Ldflags), " "))
 	pctx.StaticVariable("mips64ClangCppflags", strings.Join(clangFilterUnknownCflags(mips64Cppflags), " "))
@@ -133,7 +130,7 @@ func (t *toolchainMips64) GccRoot() string {
 }
 
 func (t *toolchainMips64) GccTriple() string {
-	return "${mips64GccTriple}"
+	return "mips64el-linux-android"
 }
 
 func (t *toolchainMips64) GccVersion() string {
@@ -161,7 +158,7 @@ func (t *toolchainMips64) IncludeFlags() string {
 }
 
 func (t *toolchainMips64) ClangTriple() string {
-	return "${mips64ClangTriple}"
+	return t.GccTriple()
 }
 
 func (t *toolchainMips64) ToolchainClangCflags() string {

cc/mips_device.go

@@ -131,8 +131,6 @@ func init() {
 	pctx.SourcePathVariable("mipsGccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/mips/mips64el-linux-android-${mipsGccVersion}")
 
-	pctx.StaticVariable("mipsGccTriple", "mips64el-linux-android")
-
 	pctx.StaticVariable("mipsToolchainLdflags", strings.Join(mipsToolchainLdflags, " "))
 	pctx.StaticVariable("mipsCflags", strings.Join(mipsCflags, " "))
 	pctx.StaticVariable("mipsLdflags", strings.Join(mipsLdflags, " "))
@@ -140,7 +138,6 @@ func init() {
 	pctx.StaticVariable("mipsIncludeFlags", bionicHeaders("mips", "mips"))
 
 	// Clang cflags
-	pctx.StaticVariable("mipsClangTriple", "mipsel-linux-android")
 	pctx.StaticVariable("mipsClangCflags", strings.Join(clangFilterUnknownCflags(mipsClangCflags), " "))
 	pctx.StaticVariable("mipsClangLdflags", strings.Join(clangFilterUnknownCflags(mipsLdflags), " "))
 	pctx.StaticVariable("mipsClangCppflags", strings.Join(clangFilterUnknownCflags(mipsCppflags), " "))
@@ -170,7 +167,7 @@ func (t *toolchainMips) GccRoot() string {
 }
 
 func (t *toolchainMips) GccTriple() string {
-	return "${mipsGccTriple}"
+	return "mips64el-linux-android"
 }
 
 func (t *toolchainMips) GccVersion() string {
@@ -202,7 +199,7 @@ func (t *toolchainMips) IncludeFlags() string {
 }
 
 func (t *toolchainMips) ClangTriple() string {
-	return "${mipsClangTriple}"
+	return "mipsel-linux-android"
 }
 
 func (t *toolchainMips) ToolchainClangLdflags() string {

cc/x86_64_device.go

@@ -140,8 +140,6 @@ func init() {
 	pctx.SourcePathVariable("x86_64GccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/x86/x86_64-linux-android-${x86_64GccVersion}")
 
-	pctx.StaticVariable("x86_64GccTriple", "x86_64-linux-android")
-
 	pctx.StaticVariable("x86_64ToolchainCflags", "-m64")
 	pctx.StaticVariable("x86_64ToolchainLdflags", "-m64")
 
@@ -179,7 +177,7 @@ func (t *toolchainX86_64) GccRoot() string {
 }
 
 func (t *toolchainX86_64) GccTriple() string {
-	return "${x86_64GccTriple}"
+	return "x86_64-linux-android"
 }
 
 func (t *toolchainX86_64) GccVersion() string {
@@ -211,7 +209,7 @@ func (t *toolchainX86_64) IncludeFlags() string {
 }
 
 func (t *toolchainX86_64) ClangTriple() string {
-	return "${x86_64GccTriple}"
+	return t.GccTriple()
 }
 
 func (t *toolchainX86_64) ToolchainClangLdflags() string {

cc/x86_device.go

@@ -159,8 +159,6 @@ func init() {
 	pctx.SourcePathVariable("x86GccRoot",
 		"prebuilts/gcc/${HostPrebuiltTag}/x86/x86_64-linux-android-${x86GccVersion}")
 
-	pctx.StaticVariable("x86GccTriple", "x86_64-linux-android")
-
 	pctx.StaticVariable("x86ToolchainCflags", "-m32")
 	pctx.StaticVariable("x86ToolchainLdflags", "-m32")
 
@@ -198,7 +196,7 @@ func (t *toolchainX86) GccRoot() string {
 }
 
 func (t *toolchainX86) GccTriple() string {
-	return "${x86GccTriple}"
+	return "x86_64-linux-android"
 }
 
 func (t *toolchainX86) GccVersion() string {