Update config.guess and config.sub: 2012-10-10

Update config.guess and config.sub: 2012-10-10

Update config.guess and config.sub to revision
fb456b34ef4aa02b95dc6be69aaa66fa94a844fb from the savannah.gnu.org git
repo. Adds support for e.g. aarch64 (ARM 64bit).

config.guess:timestamp='2012-09-25'
config.sub:timestamp='2012-10-10'
........

Merged revisions 374977 from http://svn.asterisk.org/svn/asterisk/branches/1.8

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@374991 65c4cc65-6c06-0410-ace0-fbb531ad65f3