Apply local Android modifications to ping.

This just copies files from external/ping to external/iputils.

Bug: 9469682
Change-Id: Id55cdd44e7908f1ac1faffb65eea372969de15fc
diff --git a/ping_common.h b/ping_common.h
index 27ae0f0..9cdb07b 100644
--- a/ping_common.h
+++ b/ping_common.h
@@ -33,6 +33,10 @@
 #include <linux/types.h>
 #include <linux/errqueue.h>
 
+#ifdef ANDROID
+#include <linux/icmp.h>
+#endif
+
 #include "SNAPSHOT.h"
 
 #define	DEFDATALEN	(64 - 8)	/* default data length */