IPv6: move the anycast_src_echo_reply sysctl to netns_sysctl_ipv6

This change move anycast_src_echo_reply sysctl with other ipv6 sysctls.

Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Francois-Xavier Le Bail <fx.lebail@yahoo.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc include/net/netns/ipv6.h
Simple merge

diff --cc net/ipv6/icmp.c
Simple merge

diff --cc net/ipv6/sysctl_net_ipv6.c
Simple merge