In preparation for adding junit xml to the lint tests, move the script out of Makefile.inc and into its own file. Add a copyright, usage, and error checking that was not needed inside the Makefile. Change-Id: I32bebc6a5f1f6fa652812c8a014d84006e2e6c8a Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: http://review.coreboot.org/11890 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>