net: export sysctl_[r|w]mem_max symbols needed by ip_vs_sync

To build ip_vs as a module sysctl_rmem_max and sysctl_wmem_max
needs to be exported.

The dependency was added by "ipvs: wakeup master thread" patch.
Signed-off-by: NHans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/core/sock.c

@@ -259,7 +259,9 @@ static struct lock_class_key af_callback_keys[AF_MAX];
 
 /* Run time adjustable parameters. */
 __u32 sysctl_wmem_max __read_mostly = SK_WMEM_MAX;
+EXPORT_SYMBOL(sysctl_wmem_max);
 __u32 sysctl_rmem_max __read_mostly = SK_RMEM_MAX;
+EXPORT_SYMBOL(sysctl_rmem_max);
 __u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX;
 __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;