Add cc_genrule

cc_genrule is the same as a normal genrule, but can depend on other cc
modules (like cc_object).

Test: mmma external/minijail
Change-Id: I8df87665c7bdc76ce89c92755c054f967a818e57

cc/genrule.go

@@ -0,0 +1,38 @@
+// Copyright 2017 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cc
+
+import (
+	"android/soong/android"
+	"android/soong/genrule"
+)
+
+func init() {
+	android.RegisterModuleType("cc_genrule", genRuleFactory)
+}
+
+// cc_genrule is a genrule that can depend on other cc_* objects.
+// The cmd may be run multiple times, once for each of the different arch/etc
+// variations.
+func genRuleFactory() android.Module {
+	module := genrule.NewGenRule()
+
+	module.Extra = &VendorProperties{}
+	module.AddProperties(module.Extra)
+
+	android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.MultilibBoth)
+
+	return module
+}