- drop deprecated usage of automake macro
- required for pending automake-1.13.1 bump
- should be backwards compatible with automake 1.7 (late 2002) and higher


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5219 b64f7644-9d1e-0410-96f1-a4d463321fa5