build: Cleanup and improve .phpcs.xml
build: Cleanup and improve .phpcs.xml

Use /* at the end of exclude-pattern when excluding the whole folder,
see Id95236edbd3d87f57719d235c7c9cee366180099 for explaination

Change-Id: I85dbd59864eb6479fdfe6d847de4d424e1f90080

wikimedia/RelPath,wikimedia/RelPath