Conflict between FreeBSD-binutils and FreeBSD-lld packages

[Tobias Kortkamp]

Building pkgbase packages with r330236 results in FreeBSD-binutils and
FreeBSD-lld packages conflicting with each other.  Both want to
install /usr/share/man/man1/ld.1.gz

For now I'm working around it by manually extracting FreeBSD-lld.
FreeBSD-binutils should install its man page as ld.bfd.1.gz if lld is
the set as the default linker via WITH_LLD_IS_LD.