Function sync

src/backend/opencl/platform.cpp:523–528

}

void sync(int device) {
    int currDevice = getActiveDeviceId();
    setDevice(device);
    getQueue().finish();
    setDevice(currDevice);
}

void addDeviceContext(cl_device_id dev, cl_context ctx, cl_command_queue que) {
    DeviceManager& devMngr = DeviceManager::getInstance();