Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20171120' into staging

late linux-user fixes for Qemu 2.11

# gpg: Signature made Mon 20 Nov 2017 21:19:00 GMT
# gpg:                using RSA key 0xB44890DEDE3C9BC0
# gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>"
# gpg:                 aka "Riku Voipio <riku.voipio@linaro.org>"
# Primary key fingerprint: FF82 03C8 C391 98AE 0581  41EF B448 90DE DE3C 9BC0

* remotes/riku/tags/pull-linux-user-20171120:
  linux-user: Fix calculation of auxv length
  linux-user: Handle rt_sigaction correctly for SPARC
  linux-user/sparc: Put address for data faults where linux-user expects it
  linux-user/ppc: Report correct fault address for data faults
  linux-user/s390x: Mask si_addr for SIGSEGV
  linux-user: return EINVAL from prctl(PR_*_SECCOMP)
  linux-user: fix 'finshed' typo in comment
  linux-user/syscall.c: Handle SH4's exceptional alignment for p{read, write}64
  linux-user: Handle TARGET_MAP_STACK and TARGET_MAP_HUGETLB
  linux-user/hppa: Fix TARGET_F_RDLCK, TARGET_F_WRLCK, TARGET_F_UNLCK
  linux-user/hppa: Fix TARGET_MAP_TYPE
  linux-user/hppa: Fix typo for TARGET_NR_epoll_wait
  linux-user/hppa: Fix cpu_clone_regs
  linux-user/hppa: Fix TARGET_SA_* defines
  linux-user: Restrict usage of sa_restorer

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