loongson/pypi: links for pygtk

loongson/mirror pygtk-2.24.0.win32-py2.7.msi
loongson/mirror pygtk-2.24.0.win32-py2.6.msi
loongson/mirror pygtk-2.24.0.win32-py2.6.exe
loongson/mirror pygtk-2.24.0.tar.bz2