Only package gcno files for gcov coverage builds.

Bug: 154550223
Test: m -j NATIVE_COVERAGE=true droid dist tests
Test: m -j CLANG_COVERAGE=true droid dist tests
Change-Id: I81598bcab8db105de6692156c001fc961409ce63

cc/builder.go

@@ -293,7 +293,7 @@ type builderFlags struct {
 	rsFlags       string
 	toolchain     config.Toolchain
 	tidy          bool
-	coverage      bool
+	gcovCoverage  bool
 	sAbiDump      bool
 	emitXrefs     bool
 
@@ -355,7 +355,7 @@ func TransformSourceToObj(ctx android.ModuleContext, subdir string, srcFiles and
 		tidyFiles = make(android.Paths, 0, len(srcFiles))
 	}
 	var coverageFiles android.Paths
-	if flags.coverage {
+	if flags.gcovCoverage {
 		coverageFiles = make(android.Paths, 0, len(srcFiles))
 	}
 	var kytheFiles android.Paths
@@ -456,7 +456,7 @@ func TransformSourceToObj(ctx android.ModuleContext, subdir string, srcFiles and
 
 		var ccCmd string
 		tidy := flags.tidy
-		coverage := flags.coverage
+		coverage := flags.gcovCoverage
 		dump := flags.sAbiDump
 		rule := cc
 		emitXref := flags.emitXrefs

cc/cc.go

@@ -183,7 +183,7 @@ type Flags struct {
 
 	Toolchain    config.Toolchain
 	Tidy         bool
-	Coverage  bool
+	GcovCoverage bool
 	SAbiDump     bool
 	EmitXrefs    bool // If true, generate Ninja rules to generate emitXrefs input files for Kythe
 

cc/coverage.go

@@ -82,10 +82,10 @@ func (cov *coverage) flags(ctx ModuleContext, flags Flags, deps PathDeps) (Flags
 	}
 
 	if cov.Properties.CoverageEnabled {
-		flags.Coverage = true
 		cov.linkCoverage = true
 
 		if gcovCoverage {
+			flags.GcovCoverage = true
 			flags.Local.CommonFlags = append(flags.Local.CommonFlags, "--coverage", "-O0")
 
 			// Override -Wframe-larger-than and non-default optimization

cc/util.go

@@ -82,7 +82,7 @@ func flagsToBuilderFlags(in Flags) builderFlags {
 		tidyFlags:     strings.Join(in.TidyFlags, " "),
 		sAbiFlags:     strings.Join(in.SAbiFlags, " "),
 		toolchain:     in.Toolchain,
-		coverage:      in.Coverage,
+		gcovCoverage:  in.GcovCoverage,
 		tidy:          in.Tidy,
 		sAbiDump:      in.SAbiDump,
 		emitXrefs:     in.EmitXrefs,