usb_modeswitch: update config.guess / config.sub

usb_modeswitch: update config.guess / config.sub

Fixes:
http://autobuild.buildroot.net/results/fbe/fbe21bd173e6566dd93dddd58d4a848de8a3465e/

The build system of the embedded jimtcl copy doesn't use autotools, but does
use an old version of gnuconfig which doesn't know all the architectures
supported by Buildroot, so update config.guess / config.sub like we do in
pkg-autotools.mk

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 90d86994f86fec8578772a8a7465bf912c69e1ca)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>