Log Message:
opencolorio: fix build of opencolorio, bump pkgrevision
Make sure no dependencies are downloaded using git,
only use pkgsrc dependencies.
Add patch to build with minizip-ng version 4 that is
in pkgsrc.
Set zlib and expat versions needed by opencolorio.
Set c++ extensions on cmake files for alloca.
Clean up Makefile, cmake/build.mk already uses
out-of-source build so don't create and set a
configure dir for cmake.
Remove some unused CMAKE_CONFIGURE_ARGS.
Remove fixes for alloca in Makefile since this is
now set in cmake.
Add USE_CC_FEATURES and set USE_CXX_FEATURES to the
right value.