Gcc 4.2.1 to be removed before FreeBSD 13, a firm timeline

[Ed Maste]

On Tue, 7 Jan 2020 at 10:00, Ed Maste <emaste at freebsd.org> wrote:
>
> I've been staging my gcc 4.2.1 deorbit work at
> https://github.com/emaste/freebsd/tree/deorbit-gcc; I'll force-push it
> on occasion after related changes make it into svn.

I've put the first version of these changes into Phabricator now:

1. retire BSD_CRTBEGIN option
https://reviews.freebsd.org/D23122

2. retire LLVM_LIBUNWIND option
https://reviews.freebsd.org/D23123

3. rm GCC 4.2.1 build infrastructure
https://reviews.freebsd.org/D23124

In my WIP branch the next two commits remove contrib/gcc and contrib/gcclibs.