Use -Werror in external/c-ares
am: a637506249

Change-Id: Ibdd7b07b2f3c6f36b43089294444dcddb6652b2e
diff --git a/Android.mk b/Android.mk
index 6677382..13330c1 100644
--- a/Android.mk
+++ b/Android.mk
@@ -18,7 +18,10 @@
 
 include $(CLEAR_VARS)
 LOCAL_MODULE := libcares
-LOCAL_CFLAGS += -DHAVE_CONFIG_H
+LOCAL_CFLAGS += -DHAVE_CONFIG_H \
+    -Wall -Werror \
+    -Wno-unused-function \
+    -Wno-unused-variable
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
 LOCAL_SRC_FILES := $(CSOURCES)
 include $(BUILD_SHARED_LIBRARY)