GPG support is broken by Atom's ASAR bundling

[smashwilson]

Oops 💥

15:02:46.969395 git.c:328               trace: built-in: git 'commit' '-m' 'Trust in RVO'
15:02:46.971734 run-command.c:626       trace: run_command: '/Applications/Atom.app/Contents/Resources/app.asar/node_modules/github/bin/gpg-no-tty.sh' '--status-fd=2' '-bsau' '04F69D2A'
fatal: cannot exec '/Applications/Atom.app/Contents/Resources/app.asar/node_modules/github/bin/gpg-no-tty.sh': Not a directory
error: gpg failed to sign the data
fatal: failed to write commit object

I'm guessing we just need to do the same "copy to temp directory, pass path as env var" trick we use for the other scripts.

[tomoya]

I also have the same issue from this morning.
I always launch atom from the terminal. However, the github package does not seem to be able to read environment variables.