Changed to a generic directory name for Mesa, /usr/local/Mesa on the systems where we also have NVIDIA OpenGL libraries.  This is now up to version 6.0
Changed to a generic directory name for Mesa, /usr/local/Mesa on the systems
where we also have NVIDIA OpenGL libraries.  This is now up to version 6.0


git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@2954 3c1deb5b-d424-0410-962d-aba41a686d42

hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,hsorby/zinc