Revert "Revert "Make build warnings be errors""

This reverts commit 984b4f2db2f5969afff6420739f6d785f4a14bf3.

Change-Id: I4d0f420a063c611afe5b5c9fa809e34799f66ea1
diff --git a/radio/Android.mk b/radio/Android.mk
index ecbb8fd..0377328 100644
--- a/radio/Android.mk
+++ b/radio/Android.mk
@@ -36,4 +36,6 @@
 
 LOCAL_MODULE:= libradio
 
+LOCAL_CFLAGS := -Werror -Wall
+
 include $(BUILD_SHARED_LIBRARY)