Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-5.2-pull-request...

Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-5.2-pull-request' into staging

Add clock_getres_time64, timer_gettime64, timer_settime64,
    timerfd_gettime64, timerfd_settime64
Some fixes (page protection, print_fdset, timerspec, itimerspec)

# gpg: Signature made Sun 23 Aug 2020 15:58:53 BST
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-5.2-pull-request:
  linux-user: Fix 'utimensat()' implementation
  linux-user: Add support for a group of 2038 safe syscalls
  linux-user: Modify 'target_to_host/host_to_target_itimerspec()'
  linux-user: Adjust guest page protection for the host
  linux-user: Validate mmap/mprotect prot value
  linux-user: Fix "print_fdset()" in "strace.c" to not print ", " after last value

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