The python3-minimal package provides /usr/bin/python3 on Debian.
This commit installs this package so a `python3` executable is
provided.
This required backporting the package to wheezy. The final patch
is trivial. But I wasted a bit of time figuring out why `mk-build-deps`
wasn't working. It would no-op and exit 0 and then the build would
complain about missing dependencies!
glandium's theory is that the ":any" multiarch support on wheezy
isn't complete. Removing ":any" seems to make things "just work."
MozReview-Commit-ID: FBicpK4SmkQ
--HG--
extra : rebase_source : a28ce731024e8ed6a43fb30e2ed57da2abb50d0f
Gregory Szorc