debugger: make string cutoff value configurable

Change-Id: I118016956a597ad689daa438f5517a47efe3cef0
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -4905,6 +4905,10 @@ void GdbEngine::loadPythonDumpers()
     postCommand("python execfile('" + dumperSourcePath + "qttypes.py')",
         ConsoleCommand|NonCriticalResponse);
 
+    postCommand("python qqStringCutOff = "
+        + debuggerCore()->action(MaximalStringLength)->value().toByteArray(),
+        ConsoleCommand|NonCriticalResponse);
+
     loadInitScript();
 
     postCommand("bbsetup", ConsoleCommand, CB(handleHasPython));