Implementation of glLogicOp

Bug 22375329

Change-Id: Id6684e33bf3cd37fce48e7607e6a65fe64309f72
Reviewed-on: https://swiftshader-review.googlesource.com/2764
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Maxime Grégoire <mgregoire@google.com>
19 files changed