Investigate Bazel for using it as a deterministic builds tool for Tor Browser
A while ago Google announced Bazel (http://bazel.io/) which should be capable of doing deterministic builds. We might want to investigate whether switching to it/integrating it into our current system would be saner as the solution we have right now.
Note http://bazel.io/FAQ.html section "Will Bazel make my builds reproducible automatically?" where a lot of the issues are listed that are time-consuming in a Gitian environment as well. Thus, if we switched to Bazel we would need to deal with them there, too.