[llvm-commits] Update to latest versions of config.guess and config.sub from GNU mainline

[Ivan Krasin]

Hi llvm team,

This patch updates autoconfig/config.{sub,guess} to the latest version
from the GNU upstream: git://git.savannah.gnu.org/config.git

1. It eliminates a local LLVM patch for auroraux (because, the
mainline config.sub has already got support of auroraux)
2. It adds several new recognized target cpus and operating systems
(in particular, PNaCl)

Please, let me know if it's fine to commit.

Ivan Krasin