QmlJS: Ignore .pragma library for now.

Task-number: QTCREATORBUG-1421
Reviewed-by: Erik Verbruggen

src/libs/qmljs/qmljsdocument.h

@@ -89,6 +89,7 @@ public:
 
 private:
     bool parse_helper(int kind);
+    static void extractPragmas(QString *source);
 
 private:
     QmlJS::Engine *_engine;