Log Message:
Update xmess to 0.69.1.

Changes since 0.68.1 includes:
- Re-added Ben Collins' core change that adds support for extra mice.
- Reverted to using the original fronthlp.c (from 0.67.2) modified to
  work with the 0.69 core.
- Fixed a logic bug in the XInput devices button-handling.  (Ben
  Collins)
- Made a tiny fix in fileio.c that allows specifying direct paths to
  roms to work again; e.g., ./xmame.x11 ./moo.zip