loongson/pypi: links for pylexbuilder

loongson/mirror pylexbuilder-0.5.0.tar.gz
loongson/mirror pylexbuilder-0.4.0.tar.gz
loongson/mirror pylexbuilder-0.3.0.tar.gz
loongson/mirror pylexbuilder-0.2.0.tar.gz
loongson/mirror pylexbuilder-0.1.0.tar.gz