Bug 943874 - Update Git URL printed during mach bootstrap; r=ehsan

DONTBUILD (NPOTB)

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extra : rebase_source : e9d0f626803c2d9326f646b31f3f7bbc58a29bde
extra : amend_source : 39a4efa6ad8fd0c1d30a7d1970037edb281a471c