Debugger: Fix dumper format choosing with GDB

... and further unify GDB and LLDB code paths.

Change-Id: Id89f3804c53190c4888082891fd3c3c55eceac84
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/debugger/lldb/lldbengine.cpp

@@ -303,7 +303,7 @@ void LldbEngine::setupInferior()
         runCommand(cmd);
     }
 
-    DebuggerCommand cmd1("loadDumperFiles");
+    DebuggerCommand cmd1("loadDumpers");
     runCommand(cmd1);
 }
 
@@ -1160,6 +1160,12 @@ void LldbEngine::reloadRegisters()
         runCommand("reportRegisters");
 }
 
+void LldbEngine::reloadDebuggingHelpers()
+{
+    runCommand("reloadDumpers");
+    updateAll();
+}
+
 void LldbEngine::fetchDisassembler(DisassemblerAgent *agent)
 {
     QPointer<DisassemblerAgent> p(agent);