Dropping this in actually just works for NSS (no promises this will hold true
with Basilisk), because gyp's design is a lot more conservative and consistent
compared with upstream Mozilla code. For some reason, the new gyp couldn't find
the six library it relies on that's already in our tree, and the library also
needed a small update. Also incorporates a few simple Python 3 tweaks to our
gyp_reader code.
Jeremy Andrews
3dd092c8d8