Buildsystem changes
Today I was working on Gentoo's oyranos live ebuild for git master and along the way created a new buildsystem patch.
- When distros specifically remove bundled libs as part of their policy, configure should not fall back to using bundled libs and rather bail out when a requested dependency can't be found
- Use cmake-provided FindCups.cmake (no need to ship FindCUPS.cmake then, imo)*
* same could be done for FindFltk and FindXcm, Gentoo had been removing those files already but I didn't look if there was a specific reason for them being shipped with oyranos