mb/google/kahlee: Correct grunt HWID in GBB

Chrome OS reports that "GRUNT TEST XXXX" is an invalid hwid. The 8296
comes from the lower four numbers from running:
  $ printf "%d\n" 0x$(crc32 <(echo -n 'GRUNT TEST'))

BUG=b:72436450

Change-Id: Ib0044442396cad65c25c107feb35a30a2f70b769
Signed-off-by: Justin TerAvest <teravest@chromium.org>
Reviewed-on: https://review.coreboot.org/23411
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed