contrib: 'make' is now 'make using-bin' on Mac OS X/intel
Use 'make using-src' or 'make src' to build from source. Then 'make package-macosx' to generate a contrib package. This package has to be uploaded to ftp.videolan.org/pub/videolan/testing/contrib/package-macosx-ARCH-REV.tar.bz2. And update the contrib Makefile to use the new REV.