ndk: minor update to <netinet/...> headers.

This patch contains a minor update to the netinet headers from the C library.
Most of the changes come from later platform release, but can be safely back-ported
to previous API levels since they don't change the ABI:

- <netinet/icmp6.h>, <netinet/ip6.h>: new headers
- <netinet/in.h>: now always include <linux/ipv6.h> by default
- <netinet/in6.h>: add macros: IN6_IS_ADDR_ULA, IN6ADDR_LOOPBACK_INIT
- <netinet/ip.h>: add macro: IPTOS_MINCOST
- <net/if_ether.h>: always include <sys/types.h> by default.

ndk/platforms/android-3/include/netinet/in.h

@@ -32,6 +32,7 @@
 #include <linux/socket.h>
 #include <linux/in.h>
 #include <linux/in6.h>
+#include <linux/ipv6.h>
 #include <netinet/in6.h>
 
 __BEGIN_DECLS