Add init_rc property, equivalent to LOCAL_INIT_RC

Change-Id: I914bfff8cbdf71b6cfb2271199a964b2cdcb72d0
diff --git a/android/module.go b/android/module.go
index 216aefe..41499ca 100644
--- a/android/module.go
+++ b/android/module.go
@@ -116,6 +116,9 @@
 	// file
 	Logtags []string
 
+	// init.rc files to be installed if this module is installed
+	Init_rc []string
+
 	// Set by TargetMutator
 	CompileTarget Target `blueprint:"mutated"`