Make repairmimetypes compatible with case sensitive SQL backends

Change for #14132
Just a word of warning, ILIKE seems to be a Doctrine only clause. The statements are thus not portable.

lib/repair/repairmimetypes.php

@@ -66,7 +66,7 @@ class RepairMimeTypes extends BasicEmitter implements \OC\RepairStep {
 				SELECT `id`
 				FROM `*PREFIX*mimetypes`
 				WHERE `mimetype` = ?
-			) WHERE `name` LIKE ?
+			) WHERE `name` ILIKE ?
 		');
 	}