Copy UseSWIG.cmake from the gnuradio repository from commit
4433a7703fe3f5713c2200a0f7c11b13510f34cc
This macro is distributed in the Debian's gnuradio-dev package but it's
not available in Fedora/Centos gnuradio-devel package. The gnuradio's
version contains a fix for the parallel build 99a09af05fda6d0bab0cf3724a1c6bf453c71bc7
and some other improvements as well.
Vasil Velichkov