Tweak Raw memory macros' version constraint
Tweak Raw memory macros' version constraint

Technically these functions were around in some of the Python 3.4
prereleases. So add a more accurate version constraint.

da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,scoder/cython,da-woods/cython,cython/cython,cython/cython,cython/cython,da-woods/cython,scoder/cython