Debugger: Introduce an option to force QT_LOGGING_TO_CONSOLE=1

Debug output is ephemeral in nature, and does not belong into system logs.
It happens, however, on Arch. Let people override this.

Fixes: QTCREATORBUG-25421
Change-Id: I5686e256d76e5a127e3269c5f407daf39bad683f
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/debugger/commonoptionspage.cpp

@@ -72,6 +72,7 @@ public:
             s.switchModeOnExit,
             s.showQmlObjectTree,
             s.stationaryEditorWhileStepping,
+            s.forceLoggingToConsole,
             s.registerForPostMortem,
             Stretch()
         };