Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

KVM changes include a MIPS patch and the testdev backend used by the
ARM kvm-unit-tests.  icount include the first part of reverse execution
and Sebastian Tanase's patches to slow down -icount execution to the
desired speed of the target.

v1->v2: fix dump_drift_info to print nothing outside icount mode,
        and to compile on 32-bit architectures

# gpg: Signature made Thu 07 Aug 2014 14:09:58 BST using RSA key ID 9B4D86F2
# gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>"
# gpg:                 aka "Paolo Bonzini <bonzini@gnu.org>"

* remotes/bonzini/tags/for-upstream:
  target-mips: Ignore unassigned accesses with KVM
  monitor: Add drift info to 'info jit'
  cpu-exec: Print to console if the guest is late
  cpu-exec: Add sleeping algorithm
  icount: Add align option to icount
  icount: Add QemuOpts for icount
  icount: Fix virtual clock start value on ARM
  timer: add cpu_icount_to_ns function.
  migration: migrate icount fields.
  icount: put icount variables into TimerState.
  backends: Introduce chr-testdev

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>