Fix broken reference to packaging/libldns.pc.in
Fix broken reference to packaging/libldns.pc.in

Needs to be prefixed with "$(srcdir)/", otherwise out of tree build fails.

Signed-off-by: David Oberhollenzer <88b8c15a82fabea326f6818160940f80317a5f1d@infraroot.at>

NLnetLabs/ldns,NLnetLabs/ldns,NLnetLabs/ldns,NLnetLabs/ldns