Update dnxhd regression test to match the majority of FATE machines (which

also have a much saner stddev).

Originally committed as revision 19901 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/vsynth.regression.ref

@@ -164,8 +164,8 @@ a2ff093e93ffed10f730fa21df02fc50 *./tests/data/dv50.vsynth.out.yuv
 stddev:    1.72 PSNR: 43.37 bytes:  7603200/  7603200
 f361f3755373325551ac8d639531a8f0 *./tests/data/a-dnxhd.dnxhd
 30310400 ./tests/data/a-dnxhd.dnxhd
-321cf0d7223bfbb0bd7c431d94ef3867 *./tests/data/dnxhd.vsynth.out.yuv
-stddev:   21.37 PSNR: 21.52 bytes:  7603200/  7603200
+ccdceaf818b898fd58fc15977bab2eeb *./tests/data/dnxhd.vsynth.out.yuv
+stddev:    1.68 PSNR: 43.61 bytes:  7603200/  7603200
 595fc4e38734521356b60e67b813f0fa *./tests/data/a-svq1.mov
 1334367 ./tests/data/a-svq1.mov
 9cc35c54b2c77d36bd7e308b393c1f81 *./tests/data/svq1.vsynth.out.yuv