[Patch] Make atomics work on FreeBSD+arm

[Ed Schouten]

2013/5/26 Ed Schouten <ed at 80386.nl>:
> Unfortunately compiler-rt lacks these functions, so I'll have to add
> these first before I can do some proper tests.

Hmmm... Even weirder. It seems we have a version of compiler-rt in
FreeBSD that supports atomics, but the source file hasn't been added
to the appropriate Makefile.

Will continue hacking on this, as soon as I teach our compiler-rt a lesson.

--
Ed Schouten <ed at 80386.nl>