loongson/mirror: links for blockdiagcontrib-nationalflags

loongson/mirror blockdiagcontrib-nationalflags-0.1.6.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.5.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.4.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.3.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.2.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.1.tar.gz
loongson/mirror blockdiagcontrib-nationalflags-0.1.0.tar.gz