util/gitconfig: Add missing license headers

License header for the `gitconfig.sh` was copied from the Makefile it
was extracted from in commit 9ab8ae6a (util/gitconfig: Make gitconfig
a bash script).

License header for the pre-commit hook names Patrick Georgi as the
copyright holder as he is the original author.

Change-Id: Ie051e5e6ae7571050ece383e6be8236ed7d1ddd9
Signed-off-by: Alex Thiessen <alex.thiessen.de+coreboot@gmail.com>
Reviewed-on: https://review.coreboot.org/23097
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2 files changed