Explicitly register QtDBus-specific metatypes before attempting
to generate output. This fixes a bug when types like QDBusObjectPath
are sometimes ignored by this tool. Export QDBusMetaTypeId::init()
for that reason. Add a regression test to tst_qdbuscpp2xml.
Fixes: QTBUG-34550
Change-Id: I16faa79a794d09a26bad45e18730379681a20b50
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
86cfafcb5a