fate/lavfi: add lavfi-pixfmts_super2xsai test

tests/lavfi-regression.sh

@@ -96,6 +96,7 @@ do_lavfi_pixfmts "null"    ""
 do_lavfi_pixfmts "pad"     "500:400:20:20"
 do_lavfi_pixfmts "pixdesctest" ""
 do_lavfi_pixfmts "scale"   "200:100"
+do_lavfi_pixfmts "super2xsai" ""
 do_lavfi_pixfmts "vflip"   ""
 
 do_lavfi_lavd() {

tests/ref/lavfi/pixfmts_super2xsai

+abgr                7d8f4b961ee4808945d41290f7cf49b2
+argb                9a5676a350e52769d8293f395e8e83b2
+bgr24               6f6ad5b5d266d3643a8632fe96f8567a
+bgr555le            f4a33c43cbdac9df03637fd6901fe245
+bgr565le            fa0cf3a3fc1baae3717cac81717f7e7b
+bgra                17f36236c59c3ccf4eb9cb8bbf2f6310
+rgb24               37c805a0002d3a327a922a5b77e283e2
+rgb555le            19c7655936ad580ae859ef18c1b74c4f
+rgb565le            90e38143a89c28feef72f8e920df19b8
+rgba                d4b9d34c66e39d4549aea500d3fedf3b