debugger: prevent watchdog timer to trigger on user commands

Change-Id: Ibe493b4a85d07c4aca64880fd543d14772a3b04b
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -1146,7 +1146,9 @@ bool GdbEngine::acceptsDebuggerCommands() const
 void GdbEngine::executeDebuggerCommand(const QString &command)
 {
     QTC_CHECK(acceptsDebuggerCommands());
-    m_gdbAdapter->write(command.toLatin1() + "\r\n");
+    GdbCommand cmd;
+    cmd.command = command.toLatin1();
+    flushCommand(cmd);
 }
 
 // This is called from CoreAdapter and AttachAdapter.