If there's a host compiler in XGCCPATH, it's likely the same
relatively-current version we use for coreboot, and it's a well-known
quantity, so let's prefer that over alternatives by default.
In addition, look for the C++ host compiler as well.
Change-Id: If50341df169a476899b5a5ffd4c4fb6d21c3f4ac
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43144
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
793bf7e605