Add path properties mutator

Add a mutator pass after DepsMutator that visits every property
struct in every module looking for properties that have a tag
`android:"path"`, and automatically add a SourceDepTag dependency
on any module references (":module-name") found.  Uses a cache to
store the mapping of property struct type to locations of
properties with the tag.

Test: android/path_properties_test.go
Change-Id: I38c0497843dde4890e9342c3a6f0b402c0720742

1 files changed, 2 insertions, 0 deletions

diff --git a/android/testing.go b/android/testing.go
index b4008af37..7f443a395 100644
--- a/android/testing.go
+++ b/android/testing.go
@@ -37,6 +37,8 @@ func NewTestContext() *TestContext {
 
 	ctx.SetNameInterface(nameResolver)
 
+	ctx.postDeps = append(ctx.postDeps, registerPathDepsMutator)
+
 	return ctx
 }