Add blend intrinsic to C++ API.

Change-Id: Id4d27650d27ef50d2a503307adc60946503a5267
diff --git a/cpp/Android.mk b/cpp/Android.mk
index 8756ce7..1fba998 100644
--- a/cpp/Android.mk
+++ b/cpp/Android.mk
@@ -20,7 +20,8 @@
 	Type.cpp \
 	Allocation.cpp \
 	Script.cpp \
-	ScriptC.cpp
+	ScriptC.cpp \
+	ScriptIntrinsics.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libRS \