Squish: Expect missing manual

Change-Id: I296d492ea79512ac73dfec4d86743b1203ee9631
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

tests/system/suite_HELP/tst_HELP02/test.py

@@ -63,7 +63,7 @@ def checkQtCreatorHelpVersion(expectedVersion):
                      'Qt Creator Manual %s' % expectedVersion,
                      'Verifying whether manual uses expected version.')
     except:
-        test.fail("Missing Qt Creator Manual.")
+        test.xverify(False, "Missing Qt Creator Manual (QTCREATORBUG-13233).")
 
 def setKeyboardShortcutForAboutQtC():
     invokeMenuItem("Tools", "Options...")