Update webrtc/libjingle to r4948.

R=mallinath@chromium.org, sergeyu@chromium.org

Review URL: https://codereview.chromium.org/26719002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227825 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227826 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227825
SVN changes up to revision 227826