Fix typo

Change-Id: I47b1bdf70848fdd158538d0c3d5a6cef41f43b91
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index 479ccbb..63f9ed7 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -7,7 +7,7 @@
 LOCAL_MODULE:= libmedia_helper
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_C_FLAGS += -Werror -Wno-error=deprecated-declarations -Wall
+LOCAL_CFLAGS += -Werror -Wno-error=deprecated-declarations -Wall
 LOCAL_CLANG := true
 
 include $(BUILD_STATIC_LIBRARY)