Filter logic for ip leak misses ::ffff:0.0.0.0

The current logic filtering out "any" address is incomplete in the case
when any address in IPv4 converted in IPv6 form is not filtered out.

BUG=
R=juberti@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/44429004

Cr-Commit-Position: refs/heads/master@{#8545}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8545 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed