netns_getifaddrs: adapt to kernel changes

src/include/netns_ifaddrs.c

@@ -468,7 +468,7 @@ static int __rtnl_enumerate(int link_af, int addr_af, __s32 netns_id,
 	if (fd < 0)
 		return -1;
 
-	r = setsockopt(fd, SOL_NETLINK, NETLINK_DUMP_STRICT_CHK, &(int){1},
+	r = setsockopt(fd, SOL_NETLINK, NETLINK_GET_STRICT_CHK, &(int){1},
 		       sizeof(int));
 	if (r < 0 && netns_id >= 0) {
 		close(fd);

src/lxc/macro.h

@@ -240,8 +240,8 @@ extern int __build_bug_on_failed;
 #define prctl_arg(x) ((unsigned long)x)
 
 /* networking */
-#ifndef NETLINK_DUMP_STRICT_CHK
-#define NETLINK_DUMP_STRICT_CHK 12
+#ifndef NETLINK_GET_STRICT_CHK
+#define NETLINK_GET_STRICT_CHK 12
 #endif
 
 #ifndef SOL_NETLINK