fix loading of qmakespecs in the qt support classes

it's not sufficient to load the qmake.conf only any more.

Change-Id: Ic699ad5e202d6f3e115e44621b4c6ee2def6edd2
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/shared/proparser/profileevaluator.cpp

@@ -184,6 +184,15 @@ ProFileEvaluator::TemplateType ProFileEvaluator::templateType() const
     return TT_Unknown;
 }
 
+bool ProFileEvaluator::loadNamedSpec(const QString &specDir, bool hostSpec)
+{
+    d->m_qmakespec = specDir;
+    d->m_hostBuild = hostSpec;
+
+    d->updateMkspecPaths();
+    return d->loadSpecInternal();
+}
+
 bool ProFileEvaluator::accept(ProFile *pro, QMakeEvaluator::LoadFlags flags)
 {
     return d->visitProFile(pro, QMakeHandler::EvalProjectFile, flags) == QMakeEvaluator::ReturnTrue;