Update lavfitest reference after commit:

   Author: bcoudurier
   Date:   Sat Jul 3 03:11:04 2010 +0000

       Set graph swscale opts before parsing it, that way opts are available
       when auto-adding scalers.

It changed the swscale flags used by the auto-added scalers, and so
the output video.

Originally committed as revision 24065 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/ref/lavfi/crop_scale

-4ffe30abe99931bc9989f40ae65654b7 *./tests/data/lavfi/crop_scale.nut
+0a3d45d58b805b8c47416b9239535f94 *./tests/data/lavfi/crop_scale.nut
 8941454 ./tests/data/lavfi/crop_scale.nut

tests/ref/lavfi/crop_scale_vflip

-3b1c81bb6ce7575f5ee3088ea165dbe7 *./tests/data/lavfi/crop_scale_vflip.nut
+e88a4dfb960d0bb28ee875567bedde5d *./tests/data/lavfi/crop_scale_vflip.nut
 750727 ./tests/data/lavfi/crop_scale_vflip.nut

tests/ref/lavfi/scale200

-f7325609fdb8992bcea0cf3712ea2afc *./tests/data/lavfi/scale200.nut
+aebdc1c3e08da2a925ba7212b1fadee0 *./tests/data/lavfi/scale200.nut
 3001204 ./tests/data/lavfi/scale200.nut

tests/ref/lavfi/scale500

-7e194861897fb42e20771711fe1aace3 *./tests/data/lavfi/scale500.nut
+ef865c51156e55ce1ce38c8f90a709e6 *./tests/data/lavfi/scale500.nut
 18751503 ./tests/data/lavfi/scale500.nut