[IPV6]: Flag RTF_ANYCAST for anycast routes.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
diff --git a/include/linux/ipv6_route.h b/include/linux/ipv6_route.h
index e2f9350..d7c41d1 100644
--- a/include/linux/ipv6_route.h
+++ b/include/linux/ipv6_route.h
@@ -18,6 +18,7 @@
 					   fallback, no routers on link */
 #define RTF_ADDRCONF	0x00040000	/* addrconf route - RA		*/
 #define RTF_PREFIX_RT	0x00080000	/* A prefix only route - RA	*/
+#define RTF_ANYCAST	0x00100000	/* Anycast			*/
 
 #define RTF_NONEXTHOP	0x00200000	/* route with no nexthop	*/
 #define RTF_EXPIRES	0x00400000