Parser debugging/testing improvements

* Set objectname on all parsers to be able to distinguish between
   them more easily when debugging
 * Add some unit tests about pass-through of data we need in the
   gcc parser to the parsers that enhd up in front of the gcc parser
   This is to address QTCREATORBUG-1917.

src/plugins/qt4projectmanager/qmakeparser.cpp

@@ -40,6 +40,7 @@ using ProjectExplorer::Task;
 
 QMakeParser::QMakeParser()
 {
+    setObjectName(QLatin1String("QMakeParser"));
 }
 
 void QMakeParser::stdError(const QString &line)