Build libRS with Clang/LLVM. :)

Change-Id: I14f5bde69a07f0014a5996f5f3ae702cae80272d
diff --git a/Android.mk b/Android.mk
index 0dde1a4..5084d65 100644
--- a/Android.mk
+++ b/Android.mk
@@ -10,6 +10,7 @@
 endif
 
 include $(CLEAR_VARS)
+LOCAL_CLANG := true
 LOCAL_MODULE := libRSDriver
 
 LOCAL_SRC_FILES:= \
@@ -66,6 +67,7 @@
 RSG_GENERATOR:=$(LOCAL_BUILT_MODULE)
 
 include $(CLEAR_VARS)
+LOCAL_CLANG := true
 LOCAL_MODULE := libRS
 
 LOCAL_MODULE_CLASS := SHARED_LIBRARIES