add hardening for Windows bundles
add --enable-reloc-section patch from skruffy
make Tor and the PTs build with our mingw compilers
Update changelog and bumped Tor Browser branch.
Merge remote-tracking branch 'erinn/tbb-4.x-hardening'
Bug 12103: Adding RELRO back to browser binaries.

We removed the build-id from browser binaries in bug 11042 as it turned
out that despite the contents being exactly the same the build-id was
not occasionally. But doing that with bjcopy destroyed RELRO protections
as well. Having the build-id non-deterministic seems to be an ld issue
as switching to gold solves this.
Update versions file for Torbutton and Tor Launcher.
Add Bug 12103 to changelogs.
Merge branch 'master' of https://git.torproject.org/builders/tor-browser-bundle
Build everything 64 bit for mac...?