Stage entire git repo into build directory

Closes #27193.
Remove GIT_DIR hacks (stable)
boot2docker: update 1.4.1 bottle.
camlistore: update 0.8 bottle.
carthage: update 0.3.1 bottle.
docker: update 1.4.1 bottle.
dub: add 0.9.22 bottle.
l-smash: update 1.13.2 bottle.
pulse: update 0.1.3 bottle.
saltstack: update 2014.7.0 bottle.
syncthing: update 0.10.13 bottle.
x264: update r2455 bottle.