A script is added to CGL check latest core commit with
php-cs-fixer. This can be used by commiters before pushing
patches to gerrit to verify CGL compatibility. The bamboo
build chain will later use the same script on each pre-merge
run.

Change-Id: I40a7f4809c97f5865ccb8dc05dd9cc466be0638a
Resolves: #76965
Releases: master
Reviewed-on: https://review.typo3.org/48833


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>