Log Message:
Update xmame to version 0.58.3.

Changes since xmame-0.58.2 include:
- Fixed a memory core bug in drivers/btoads.c.  (Aaron Giles)
- Fixed an endian bug in sndhrdw/williams.c that could affect
  big-endian architectures.  (Aaron Giles)
- Added support for using multiple mice as trackballs under X11.  (Gerd
  Sussner)
- Applied a fix for a crash in Vulgus.  (Stefan Jokisch)