Changes:
- Adds optional --log-level flag and lots of debug output when level is
set to "debug"
- Adds optional --github-src-repo flag to specify a custom GitHub
repository to download source tarball from.
- Resolve all current Rubocop complaints.
The solution to get libgccjit properly working, and embedded in
Emacs.app included:
- The contents of GCC's lib folder (`/usr/local/opt/gcc/lib`) is copied
into the `Contents/MacOS/lib-<arch>-<os_version>` folder.
- Setting `LIBRARY_PATH` environment variable to correct GCC lib
folders within Emacs.app. This is done through a bash launcher script
which replaces the regular `Contents/MacOS/Emacs` executable. The main
Emacs executable itself is named `Emacs-bin` now instead, so anything
that depends on the exact process name will need updating.
- The launcher script also adds `Content/MacOS/bin` and
`Content/MacOS/libexec` folders to the PATH environment variable, to
so ensure binary tools packaged into Emacs itself are available. This
is done even when not doing a native-comp build. The launcher script
skips setting LIBRARY_PATH if it's not a native-comp build.
This should hopefully resolve both #5 and #7.
