Fix broken reference to packaging/libldns.pc.in
Needs to be prefixed with "$(srcdir)/", otherwise out of tree build fails.
@@ -370,7 +370,7 @@ uninstall-h:
test ! -d $(DESTDIR)$(includedir)/ldns || rmdir -p $(DESTDIR)$(includedir)/ldns || echo "ok, dir already gone"
exit 0
-packaging/libldns.pc: packaging/libldns.pc.in
+packaging/libldns.pc: $(srcdir)/packaging/libldns.pc.in
./config.status $@
install-pc: packaging/libldns.pc
