crossgcc: Unify tool tests, add check for g++ or clang

Change-Id: I406f5cfc61bc87ccc2c0b9283b4fbb8cef8dfc1b
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/8522
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed