Log Message:
Update gxemul to 0.4.6.5.

Changes since 0.4.6.1:

* Applying a patch from Oleksandr Tymoshenko for the wdc device, fixing the
  order of 16-bit words within 32-bit words in the identify struct, and the
  error register is not cleared on reads any more.
* The disk device used in the test machines can now access disk images
  larger than 4 GBs when emulating 32-bit architectures (as suggested by
  Julian Elischer).
* For ARM emulation, a special case for PC-relative load which wasn't
  implemented before has now been implemented. (The problem could be
  triggered by attempting large builds using NetBSD's pkgsrc inside e.g.
  NetBSD/cats.)
* The ARM 'bkpt' instruction has been implemented (patch from Jiri Svoboda).