xcompile: switch around armv7 TCARCHes

clang probing will pick up the first one that clang does not complain about
and right now that is armv7a-eabi, even though our toolchain builds for
armv7-a-eabi (and consecutively the build fails because there is no

Change-Id: I2594151150107f8e9c1aad33647dcb2f9878f953
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10830
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed