Bug 9239 follow-up: update koha-conf.xml

The previous patches were missing the koha-conf.xml updates. This patch
updates koha-conf.xml and makes the changes neccessary to include the
QueryParser configuration file in the packages.

To test:
1) Run Makefile and check generated koha-conf.xml to confirm that the
   line <queryparser_config>...</queryparser_config> is there with an
   absolute path.
2) That was it.