contribs: install latest config.guess/sub for all autotools targets
Rather than fixing errors one by one when they occur, it should be done all the time.
It's just copying 2 files so it doesn't slow down the build process much.
Also remove the tiff contrib that is never used after SDL was removed. So we don't have to patch it.
Draft on top of !5605 (merged)
Edited by Steve Lhomme