Don't tell make about modules in other namespaces

This was causing build breaks when different devices moved to Android.bp
at different times.

Bug: 150878976
Test: build *_hwasan targets
Change-Id: I68912bb6a5696809c318d1ec816a1bcfbe2df245

cc/sanitize.go

@@ -1041,7 +1041,7 @@ func sanitizerMutator(t sanitizerType) func(android.BottomUpMutatorContext) {
 					}
 
 					// Export the static lib name to make
-					if c.static() {
+					if c.static() && c.ExportedToMake() {
 						if t == cfi {
 							appendStringSync(c.Name(), cfiStaticLibs(mctx.Config()), &cfiStaticLibsMutex)
 						} else if t == hwasan {