[Bf-committers] Fedora openCOLLADA cmake fix

[Dan Eicher]

This patch (http://www.pasteall.org/23988/diff) fixes cmake so it can
build with the version of openCOLLADA that is packaged by the fedora
folks. Since they build against xml2 it looks for that instead of
expat so would require anyone building their own collada to link
against that too.

It would be pretty easy for the other platforms to also use the
find.cmake files but I can't test those so left it alone.

Oh, also includes a couple super tiny fixes for cpack.

Dan