racoon: Add SIOCSIFNETMASK

XAUTH based VPNs
1. IPSec XAUTH PSK
2. IPSec XAUTH RSA
fail with the following error from racoon

  01-24 16:46:05.583 18712 18712 W ip-up-vpn: type=1400 audit(0.0:390):
  avc: denied { ioctl } for path="socket:[954683]" dev="sockfs" ino=954683
  ioctlcmd=891c scontext=u:r:racoon:s0 tcontext=u:r:racoon:s0
  tclass=udp_socket permissive=0

"setenforce 0" on the device fixed the issue.

Bug: 34690009
Test: Policy compiles
Change-Id: Idc0d156ec32e7a9be3825c380c3cb0359fe4fabe