Add IPV6_MULTICAST_ALL from Linux 4.20 to bits/in.h

[Joseph Myers]

This patch adds the IPV6_MULTICAST_ALL constant from Linux 4.20 to
bits/in.h.

Tested for x86_64.

2018-12-31  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/unix/sysv/linux/bits/in.h (IPV6_MULTICAST_ALL): New
	macro.

diff --git a/sysdeps/unix/sysv/linux/bits/in.h b/sysdeps/unix/sysv/linux/bits/in.h
index 2c86102629..5716e6475e 100644
--- a/sysdeps/unix/sysv/linux/bits/in.h
+++ b/sysdeps/unix/sysv/linux/bits/in.h
@@ -191,6 +191,7 @@ struct in_pktinfo
 #define IPV6_V6ONLY		26
 #define IPV6_JOIN_ANYCAST	27
 #define IPV6_LEAVE_ANYCAST	28
+#define IPV6_MULTICAST_ALL	29
 #define IPV6_IPSEC_POLICY	34
 #define IPV6_XFRM_POLICY	35
 #define IPV6_HDRINCL		36

-- 
Joseph S. Myers
joseph@codesourcery.com