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

meson fixes:

* --disable-tools --enable-system build
* s390 no-TCG build
* fdmon-io_uring
* 'shift' error message in version_ge()

# gpg: Signature made Fri 21 Aug 2020 22:12:29 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini-gitlab/tags/for-upstream:
  keymaps: update
  meson: Fix --disable-tools --enable-system builds
  meson: convert pc-bios/keymaps/Makefile
  configure: silence 'shift' error message in version_ge()
  util/meson.build: fix fdmon-io_uring build
  target/s390x: fix meson.build issue

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