media-video/makemkv: Add Qt5 support, closes bug #569768

media-video/makemkv: Add Qt5 support, closes bug #569768

Qt5 always trumps Qt4 if it is available. There are no configure
options or variables to control this and there is no publicly
available configure.ac either so we have to selectively patch the raw
configure script directly.

Also make a couple of simplifications. src_configure checked for a
configure script even though there is always one there now. I also
couldn't see any reason for having virtual/opengl as a dependency.

Package-Manager: portage-2.2.26