Only use CFLAGS for other pythons when extension is present.
Only use CFLAGS for other pythons when extension is present.

pombredanne/pyp2rpm,joequant/pyp2rpm,fedora-python/pyp2rpm,mcyprian/pyp2rpm,henrysher/spec4pypi,yuokada/pyp2rpm,MichaelMraka/pyp2rpm