binaries/data/mods/mod/art/textures/cursors/test.png and binaries/data/mods/public/art/textures/cursors/arrow-default.png were previously a copy of the same file (same md5), during conversion in r16386 they were indipendently converted and had different md5 (just the date inside the png was different). Use again the same file just to make obvious they are identical.

Refs: #2823.