Compile the mdns codebase with -fwrapv.
am: 9b8f4332a2

Change-Id: Ie7dd34ea3f393e35df44e7a342070332b8b408e9
diff --git a/Android.mk b/Android.mk
index 21143a3..0ef962c 100644
--- a/Android.mk
+++ b/Android.mk
@@ -10,6 +10,7 @@
 commonFlags := \
     -O2 -g \
     -fno-strict-aliasing \
+    -fwrapv \
     -D_GNU_SOURCE \
     -DHAVE_IPV6 \
     -DNOT_HAVE_SA_LEN \
@@ -20,6 +21,7 @@
     -W \
     -Wall \
     -Wextra \
+    -Wno-address-of-packed-member \
     -Wno-array-bounds \
     -Wno-pointer-sign \
     -Wno-unused \