Use archives.fedoraproject.org for yum EPEL repos on manylinux2010
Use archives.fedoraproject.org for yum EPEL repos on manylinux2010

Centos 6 is EOL and is no longer available from the usual mirrors, so switch
to archives.fedoraproject.org for EPEL

pypa/manylinux,manylinux/manylinux,pypa/manylinux,manylinux/manylinux,pypa/manylinux