Squish: Fix timing issue on linux (too fast to catch).

Change-Id: Ia52abf2de8ef35269c11c198351e5024eae01830
Reviewed-by: Christian Stenger <christian.stenger@nokia.com>
Reviewed-by: Robert Löhning <robert.loehning@nokia.com>
Reviewed-by: Bill King <bill.king@nokia.com>

tests/system/suite_qtquick/tst_qml_editor/test.py

@@ -12,6 +12,7 @@ def main():
     # using a temporary directory won't mess up an eventually exisiting
     workingDir = tempDir()
     prepareTemplate(sourceExample)
+    prepareForSignal("{type='CppTools::Internal::CppModelManager' unnamed='1'}", "sourceFilesRefreshed(QStringList)")
     createNewQtQuickApplication(workingDir, "untitled", templateDir + "/qml/focus.qml")
     # wait for parsing to complete
     waitForSignal("{type='CppTools::Internal::CppModelManager' unnamed='1'}", "sourceFilesRefreshed(QStringList)", 30000)