Use http (not https) to sync jsoncpp.

This is mainly to be consistent with the other repos, but there's also a slim chance it's triggering an issue on the buildbot
Review URL: http://webrtc-codereview.appspot.com/154005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@604 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed