mesa: Also track a remapped version of the color logic op

mesa: Also track a remapped version of the color logic op

With the exception of NVIDIA hardware, these are is the values that all
hardware and Gallium want.  The remapping is currently implemented in at
least 6 places.  This starts the process of consolidating to a single
place.

v2: sed --in-place -e 's/color_logic_ops/gl_logicop_mode/g' $(grep -lr
color_logic_ops src/) suggested by Brian.  Added some comments about the
selection of bit patterns for gl_logicop_mode and the GLenums.
Suggested by Nicolai.  Folded the GLenum_to_color_logicop macro into its
only users.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com> [v1]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>