lua-5.2: added Lua specfile patches for 'peaceful coexistence'.

lua-5.2: added Lua specfile patches for 'peaceful coexistence'.

Added two patches that allow Lua-5.2.x and Lua-5.1.x to co-
exist without conflicts with whichever version you happen to
have installed on your system. To get the additional version
installed, take the Fedora source RPM of the version you want,
patch its specfile with the patch in this commit, then build
and install. So rougly:

    rpm -ivh <uri-of-fedora-lua.src.rpm>
    patch -p0 < <patch-from-this-commit>
    rpm -bb ~/rpmbuild/SPECS/lua.spec
    rpm -ivh ~/rpmbuild/RPMS/<arch>/lua-*.rpm