loongson/pypi: links for pysiglib

loongson/mirror pysiglib-1.0.0.tar.gz
loongson/mirror pysiglib-0.2.3.tar.gz
loongson/mirror pysiglib-0.2.2.tar.gz
loongson/mirror pysiglib-0.2.1.tar.gz
loongson/mirror pysiglib-0.2.0.tar.gz
loongson/mirror pysiglib-0.1.0.tar.gz