Merge remote-tracking branch 'afaerber/tags/qom-cpu-for-anthony' into staging

QOM CPUState refactorings / X86CPU

* gdbstub coprocessor register count bugfix
* QOM instance_post_init infrastructure to override dynamic properties
* X86CPU HyperV preparations for CPU subclasses

# gpg: Signature made Fri 16 Aug 2013 11:49:02 AM CDT using RSA key ID 3E7E013F
# gpg: Can't check signature: public key not found

# By Eduardo Habkost (3) and others
# Via Andreas Färber
* afaerber/tags/qom-cpu-for-anthony:
  cpus: Use cpu_is_stopped() efficiently
  target-i386: Move hyperv_* static globals to X86CPU
  qdev: Set globals in instance_post_init function
  qom: Introduce instance_post_init hook
  tests: Unit tests for qdev global properties handling
  gdbstub: Fix gdb_register_coprocessor() register counting