from ports, remove the symlink dance with libGL/libEGL/libgles and the
nvidia-driver ports.
* Revert libGL/libEGL/libglesv2 ports to normal.
* Rename the conflicting libraries from the nvidia-driver ports with a
-NVIDIA prefix and install a libmap.conf file to map to these versions.
* Remove the special case from Mk/Scripts/qa.sh for libGL and libEGL.
* Sadly the symlink dance between nvidia-driver and xorg-server for glx.so
need to stay, due to xorg-server opening that file with dlopen(3).
Approved by: portmgr@ (mat@ (prio version))
Differential Revision: https://reviews.freebsd.org/D7848
50a34a0774