Update fteproxy to latest stable in TBB
As suggested by gk in [1], we should update fteproxy to the latest version.
See my patch at [2].
-Kevin
[1] https://trac.torproject.org/projects/tor/ticket/13364#comment:5 [2] https://github.com/kpdyer/tor-browser-bundle/commit/524fd757efb83adf029f7cd2fb9554ae526fcbe6