toolchain.inc: test IASL by version string instead of number

Test that the coreboot toolchain version of IASL is being used by
looking for the string 'coreboot toolchain' instead of a specific
version number.  While this may cause people to have to rebuild
their toolchains again now, it helps to prevent toolchain failures
when bisecting in the future.

Change-Id: I9913eeae8f29ddc3ec8c70077c05d898595eb283
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12847
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed