Comment 1 for bug 507765

I've prepared a debdiff implementing the requested changes, as well as cleaning up the libdrm-dev dependency on libnouveau for non-linux ports (fairly meaningless in the context of Ubuntu, but matches the lines in debian/rules). I've tested builds in lucid for both amd64 and powerpc, and the results seem sane (although I obviously have no way to test if the libdrm-intel code actually works on powerpc rather than just being present as a library and headers).