binder: Turn on -Werror

Change-Id: I0ee785927a7ae5f731b02176b0b781b87c22a24e
diff --git a/libs/binder/Android.mk b/libs/binder/Android.mk
index 3d873c5..6781407 100644
--- a/libs/binder/Android.mk
+++ b/libs/binder/Android.mk
@@ -46,6 +46,7 @@
 LOCAL_CFLAGS += -DBINDER_IPC_32BIT=1
 endif
 endif
+LOCAL_CFLAGS += -Werror
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
@@ -57,4 +58,5 @@
 LOCAL_CFLAGS += -DBINDER_IPC_32BIT=1
 endif
 endif
+LOCAL_CFLAGS += -Werror
 include $(BUILD_STATIC_LIBRARY)