RaspiStillYUV: Add the equivalent "all manual" patch for faster captu…

…res.

Adds the equivalent to "Add option to start in burst mode if AE settings
are manual" patch to RaspiStillYUV so it too can drop straight into
capture mode.

See #640

host_applications/linux/apps/raspicam/RaspiStillYUV.c

@@ -1135,6 +1135,14 @@ int main(int argc, const char **argv)
       if (state.common_settings.verbose)
          fprintf(stderr, "Starting component connection stage\n");
 
+      if (state.burstCaptureMode &&
+          state.camera_parameters.exposureMode == MMAL_PARAM_EXPOSUREMODE_OFF &&
+          state.camera_parameters.shutter_speed &&
+          state.camera_parameters.analog_gain && state.camera_parameters.stats_pass)
+      {
+         mmal_port_parameter_set_boolean(state.camera_component->control,  MMAL_PARAMETER_CAMERA_BURST_CAPTURE, 1);
+      }
+
       camera_preview_port = state.camera_component->output[MMAL_CAMERA_PREVIEW_PORT];
       camera_video_port   = state.camera_component->output[MMAL_CAMERA_VIDEO_PORT];
       camera_still_port   = state.camera_component->output[MMAL_CAMERA_CAPTURE_PORT];