dash gets an update to 0.5.7 plus a few additional configure flags
to add functionality to its shell supporting file and directory
globbing and matching expressions from libc fnmatch(3) and glob(3).
I also added a test def. This was compiled on OSX 64bit 10.6.8
using llvm 2335 and gcc-4.2.1. It fails_with_clang, an ld error,
though I've not seen fails_with_clang in a formula so I left it out.
Undefined symbols for architecture x86_64:
"_bgcmd", referenced from:
_builtincmd in builtins.o
ClosesHomebrew/homebrew#7637.
Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>