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'
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Merged revisions 374977 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 374991 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 374995 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@374996 65c4cc65-6c06-0410-ace0-fbb531ad65f3