fate: add streamcopy test for apng

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 719c15aa)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

tests/lavf-regression.sh

@@ -216,6 +216,9 @@ if [ -n "$do_apng" ] ; then
 file=${outfile}lavf.apng
 do_avconv $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $ENC_OPTS -t 1 -pix_fmt rgb24
 do_avconv_crc $file $DEC_OPTS -i $target_path/$file -pix_fmt rgb24
+file_copy=${outfile}lavf.copy.apng
+do_avconv $file_copy $DEC_OPTS -i $file $ENC_OPTS -c copy
+do_avconv_crc $file_copy $DEC_OPTS -i $target_path/$file_copy
 file=${outfile}lavf.png
 do_avconv $file $DEC_OPTS -f image2 -vcodec pgmyuv -i $raw_src $ENC_OPTS -pix_fmt rgb24 -frames:v 1 -f apng
 do_avconv_crc $file $DEC_OPTS -i $target_path/$file -pix_fmt rgb24

tests/ref/lavf/apng

 a4c46fad7716ad094eb3c78b74ca0244 *./tests/data/lavf/lavf.apng
 6209864 ./tests/data/lavf/lavf.apng
 ./tests/data/lavf/lavf.apng CRC=0x87b3c15f
+a4c46fad7716ad094eb3c78b74ca0244 *./tests/data/lavf/lavf.copy.apng
+6209864 ./tests/data/lavf/lavf.copy.apng
+./tests/data/lavf/lavf.copy.apng CRC=0x87b3c15f
 c5900fdd1b2fc30b985793f5226fd0c4 *./tests/data/lavf/lavf.png
 248854 ./tests/data/lavf/lavf.png
 ./tests/data/lavf/lavf.png CRC=0xd8c7b7a1