Hybrid soong/mk build using prebuilts

Change-Id: I96daa69af27bd19c8bfbe327a1318f51c738fc03
diff --git a/Android.bp b/Android.bp
index 9a7beb8..52bdc7c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -89,6 +89,7 @@
         "soong-glob",
     ],
     srcs: [
+        "common/androidmk.go",
         "common/arch.go",
         "common/config.go",
         "common/defaults.go",
@@ -114,6 +115,7 @@
         "soong-genrule",
     ],
     srcs: [
+        "cc/androidmk.go",
         "cc/builder.go",
         "cc/cc.go",
         "cc/clang.go",
@@ -171,6 +173,7 @@
         "soong-genrule",
     ],
     srcs: [
+        "java/androidmk.go",
         "java/app_builder.go",
         "java/app.go",
         "java/builder.go",