scripts: update config.guess and config.sub

This updates these two files to commit 2fa97a8a0ed3 ("config.guess
(amd64:CYGWIN*:*:*, x86_64:CYGWIN*:*:*): Set master") which is the
current master of
https://git.savannah.gnu.org/gitweb/?p=config.git;a=summary

This contains updates for multiple architectures and will unbreak the
build on the x32 ABI.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>