Merge remote-tracking branch 'remotes/ehabkost/tags/x86-pull-request' into staging

x86 queue, 2016-09-19

# gpg: Signature made Mon 19 Sep 2016 19:38:05 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <[email protected]>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-pull-request:
  linux-user-i386: Fix crash on cpuid
  kvm/apic: drop debugging
  target-i386: Use struct X86XSaveArea in fpu_helper.c

Signed-off-by: Peter Maydell <[email protected]>