APEX respects relative_install_path

am: b7c24df220

Change-Id: I78a018e6116ddb88025b98d66f442ce36776a4c0

cc/cc.go

@@ -315,6 +315,7 @@ type installer interface {
 	inData() bool
 	inSanitizerDir() bool
 	hostToolPath() android.OptionalPath
+	relativeInstallPath() string
 }
 
 type dependencyTag struct {
@@ -413,6 +414,13 @@ func (c *Module) UnstrippedOutputFile() android.Path {
 	return nil
 }
 
+func (c *Module) RelativeInstallPath() string {
+	if c.installer != nil {
+		return c.installer.relativeInstallPath()
+	}
+	return ""
+}
+
 func (c *Module) Init() android.Module {
 	c.AddProperties(&c.Properties, &c.VendorProperties)
 	if c.compiler != nil {

cc/installer.go

@@ -73,7 +73,7 @@ func (installer *baseInstaller) installDir(ctx ModuleContext) android.OutputPath
 		dir = filepath.Join(dir, "vendor")
 	}
 	return android.PathForModuleInstall(ctx, dir, installer.subDir,
-		String(installer.Properties.Relative_install_path), installer.relative)
+		installer.relativeInstallPath(), installer.relative)
 }
 
 func (installer *baseInstaller) install(ctx ModuleContext, file android.Path) {
@@ -91,3 +91,7 @@ func (installer *baseInstaller) inSanitizerDir() bool {
 func (installer *baseInstaller) hostToolPath() android.OptionalPath {
 	return android.OptionalPath{}
 }
+
+func (installer *baseInstaller) relativeInstallPath() string {
+	return String(installer.Properties.Relative_install_path)
+}