Use -Werror in external/libmojo am: 9ece443079
am: 0e2d9f9a9a

Change-Id: I366a1fed833b377c913b762b3ad59ea1e5155408
diff --git a/Android.mk b/Android.mk
index f2f18cb..482194c 100644
--- a/Android.mk
+++ b/Android.mk
@@ -159,6 +159,8 @@
 	mojo/public/cpp/system/watcher.cc \
 
 LOCAL_CFLAGS := \
+	-Wall \
+	-Werror \
 	-Wno-unused-parameter \
 	-Wno-missing-field-initializers \
 	-DMOJO_EDK_LEGACY_PROTOCOL \