QmlJS: Use the canonical paths for the Documents.

Otherwise the paths may end up with ../ or /./ in them and confuse the
Qml import resolving.

Reviewed-by: Thomas Hartmann

src/libs/qmljs/qmljsdocument.cpp

@@ -47,10 +47,10 @@ Document::Document(const QString &fileName)
     , _isQmlDocument(false)
     , _documentRevision(0)
     , _parsedCorrectly(false)
-    , _fileName(fileName)
 {
     QFileInfo fileInfo(fileName);
-    _path = fileInfo.absolutePath();
+    _path = fileInfo.canonicalPath();
+    _fileName = fileInfo.canonicalFilePath();
 
     // ### Should use mime type
     if (fileInfo.suffix() == QLatin1String("qml")