loongson/pypi: links for pexpect-u

loongson/mirror pexpect-u-2.5.1.zip
loongson/mirror pexpect-u-2.5.1.tar.gz
loongson/mirror pexpect_u-2.5.1-py3.2.egg
loongson/mirror pexpect-u-2.5.zip
loongson/mirror pexpect-u-2.5.tar.gz
loongson/mirror pexpect_u-2.5-py3.2.egg