loongson/pypi: links for extra-keras-utils

loongson/mirror extra_keras_utils-1.0.4.tar.gz
loongson/mirror extra_keras_utils-1.0.3.tar.gz
loongson/mirror extra_keras_utils-1.0.2.tar.gz
loongson/mirror extra_keras_utils-1.0.1.tar.gz
loongson/mirror extra_keras_utils-1.0.0.tar.gz