QmlJS: Fix running qmldump on plugins that require a specific uri.

The builtin QML plugins require to be imported with the full uri, i.e.
import Qt.labs.particles 1.0
so setting the import path to imports/Qt/labs and doing
import particles 1.0
is not supposed to work. (see QTBUG-11139)

This change adjusts qmldump to take an import path *and* the import uri,
so it will be able to dump the type information for these plugins.

Reviewed-by: Erik Verbruggen

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -94,6 +94,8 @@ public:
 
     virtual QStringList importPaths() const = 0;
 
+    virtual void loadPluginTypes(const QString &libraryPath, const QString &importPath, const QString &importUri) = 0;
+
 signals:
     void documentUpdated(QmlJS::Document::Ptr doc);
     void documentChangedOnDisk(QmlJS::Document::Ptr doc);