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-Original-Commit-Position: refs/heads/master@{#8545}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 59ae5ff31029b88f7334838d3b8f5eef9956f464
2 files changed