Snap for 4402171 from 71c6d11e1fef4a52db0563ebca05dbd006467855 to pi-release

Change-Id: Icb93bb1d6f1a7473baf34049b931bc9f5d88194f
diff --git a/Android.mk b/Android.mk
index 4bc8f44..e0acf1a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -2,6 +2,8 @@
 
 iputils_cflags := \
   -D_GNU_SOURCE \
+  -Wall -Werror \
+  -Wno-constant-conversion \
   -Wno-missing-field-initializers \
   -Wno-sign-compare \
   -Wno-unused-parameter \