[binutils-gdb] sim: microblaze: convert to nrun

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 2b4bc832a7668438827f5cdca9bf22adab85a915 ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: 2b4bc832a7668438827f5cdca9bf22adab85a915

sim: microblaze: convert to nrun
This port already was storing its cpu state in the sim_cpu structure, so
converting it over was pretty easy.  It is allocating memory itself still,
but we'll fix that up in the future at some point.