Extend CPython C-API test to at least include (and thus parser) all .pxd files.
Extend CPython C-API test to at least include (and thus parser) all .pxd files.

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