Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160915' into staging

Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160915' into staging

linux-user changes since 2.7 release

# gpg: Signature made Thu 22 Sep 2016 13:09:17 BST
# 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-20160915: (26 commits)
  linux-user: fix TARGET_NR_select
  linux-user: Fix incorrect offset of tuc_stack in ARM do_sigframe_return_v2
  linux-user: Sanity check clone flags
  linux-user: Remove unnecessary nptl_flags variable from do_fork()
  linux-user: Implement force_sigsegv() via force_sig()
  linux-user: SIGSEGV from sigreturn need not be fatal
  linux-user: ARM: Give SIGSEGV if signal frame setup fails
  linux-user: SIGSEGV on signal entry need not be fatal
  linux-user: Pass si_type information to queue_signal() explicitly
  linux-user: Recheck for pending synchronous signals too
  linux-user: ppc64: set MSR_CM bit for BookE 2.06 MMU
  linux-user: Use correct target SHMLBA in shmat()
  linux-user: Use glib malloc functions in load_symbols()
  linux-user: Check dump_write() return in elf_core_dump()
  linux-user: Fix error handling in flatload.c target_pread()
  linux-user: Fix incorrect use of host errno in do_ioctl_dm()
  linux-user: Check lock_user() return value for NULL
  linux-user: Pass missing MAP_ANONYMOUS to target_mmap() call
  linux-user: report signals being taken in strace output
  linux-user: Range check the nfds argument to ppoll syscall
  ...

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