Bountysource campaign to save the m68k back end in GCC

The m68k backend in gcc is one of the backends which hasn't gone through the CC0 transition yet [1, 2].

This campaign aims to collect donations for a bounty to pay a skilled developer to convert the m68k backend from CC0 to MODE_CC representation.

Without the transition, the m68k is threatened to be removed with gcc-11 which would mean that projects like AROS, NetBSD/m68k and Linux/m68k would no longer have access to the latest version of gcc.

> [1] https://gcc.gnu.org/wiki/CC0Transition

> [2] https://gcc.gnu.org/backends.html

> [3] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91851