Misc: Add patches folder to gitignore

Adds Patches folder to git ignore so that changing branches/stashing/unstashing does not impact patches files in repository folder.
This matches how the cheats folder is handled.

.gitignore

@@ -71,6 +71,7 @@ oprofile_data/
 /bin/bios
 /bin/cache
 /bin/cheats
+/bin/patches
 /bin/covers
 /bin/dumps
 /bin/gamesettings