Close opened paths

Test: m nothing
Change-Id: I7fcc8e2fdbca1cd231ff1e72b02156f12078072b

android/bazel.go

@@ -713,6 +713,7 @@ func GetMainClassInManifest(c Config, filepath string) (string, error) {
 	if err != nil {
 		return "", err
 	}
+	defer file.Close()
 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
 		line := scanner.Text()

android/soong_config_modules.go

@@ -378,6 +378,7 @@ func loadSoongConfigModuleTypeDefinition(ctx LoadHookContext, from string) map[s
 			ctx.PropertyErrorf("from", "failed to open %q: %s", from, err)
 			return (map[string]blueprint.ModuleFactory)(nil)
 		}
+		defer r.Close()
 
 		mtDef, errs := soongconfig.Parse(r, from)
 		if ctx.Config().runningAsBp2Build {