Converting CGEN from CVS to git

[Frank Ch. Eigler]

Hi -

> [...]
> Could we not start in a separate repository, then if we find that
> there is some problem that would be made easier by having the source
> in bintuils-gdb we can do that later?
> 
> Part of my motivation for patching binutils-gdb to not require CGEN
> in-tree was a vision of a future where CGEN would exist as a true
> standalone utility that was simply used by binutils (like gcc, flex,
> etc).

We've dropped the ball on this thread.  I'd be happy to look over
someone else's cvs-git conversion for this (src/cgen + src/cpu?),
or try my own.  There are no blockers to having it on sourceware.

- FChE