Create bootstrap script

[jedavies-dev]

Create a script that can be run on a standard gnu libc / gcc system. E.g. Redhat, Ubuntu etc.

The script should create a Glasnost release tarball, same as what can be downloaded from the release page.

This could be a shell script or Makefile.

It will need to do something similar to konimex's llvm bootstrap repo, but more generic - i.e. it should not require the KISS package manager, musl libc etc.

See also musl-cross-make.