loongson/pypi: links for pygs

loongson/mirror PyGS-0.5.0.tar.gz
loongson/mirror PyGS-0.5.0-py2.7-macosx-10.5-x86_64.egg
loongson/mirror PyGS-0.4.2.tar.gz
loongson/mirror PyGS-0.4.2-py2.7-macosx-10.5-x86_64.egg
loongson/mirror PyGS-0.4.1-2.tar.gz
loongson/mirror PyGS-0.4.1-py2.7-macosx-10.5-x86_64.egg
loongson/mirror PyGS-0.4.0.tar.gz
loongson/mirror PyGS-0.4.0-py2.7-macosx-10.5-x86_64.egg