Create src file provider in build/blueprint

Change-Id: I7091effe7791c1f3ea57e775b37cd72f4ee13d03

Android.bp

@@ -52,6 +52,7 @@ bootstrap_go_package {
         "provider.go",
         "scope.go",
         "singleton_ctx.go",
+        "source_file_provider.go"
     ],
     testSrcs: [
         "context_test.go",

bootstrap/bootstrap.go

@@ -337,6 +337,7 @@ func (g *GoPackage) GenerateBuildActions(ctx blueprint.ModuleContext) {
 
 	buildGoPackage(ctx, g.pkgRoot, g.properties.PkgPath, g.archiveFile,
 		srcs, genSrcs)
+	ctx.SetProvider(blueprint.SrcsFileProviderKey, blueprint.SrcsFileProviderData{SrcPaths: srcs})
 }
 
 func (g *GoPackage) Srcs() []string {
@@ -533,6 +534,7 @@ func (g *GoBinary) GenerateBuildActions(ctx blueprint.ModuleContext) {
 		Validations: validations,
 		Optional:    !g.properties.Default,
 	})
+	ctx.SetProvider(blueprint.SrcsFileProviderKey, blueprint.SrcsFileProviderData{SrcPaths: srcs})
 }
 
 func buildGoPluginLoader(ctx blueprint.ModuleContext, pkgPath, pluginSrc string) bool {

source_file_provider.go

@@ -0,0 +1,7 @@
+package blueprint
+
+type SrcsFileProviderData struct {
+	SrcPaths []string
+}
+
+var SrcsFileProviderKey = NewProvider(SrcsFileProviderData{})