Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2020-09-07' into...

* Fixes for cross-compiling with MinGW / compiling with MSYS2
* Enable cross-compiler builds in the Gitlab CI
* Improvements / fixes for the crypto tests in the Gitlab CI
* Fix for the "make check-acceptance" microblaze failure
  (required to get the Gitlab CI green again)

# gpg: Signature made Mon 07 Sep 2020 13:03:31 BST
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2020-09-07:
  target/microblaze: Collected fixes for env->iflags
  tests/qtest: do not list ahci-test twice
  gitlab: expand test coverage for crypto builds
  crypto: fix build with gcrypt enabled
  gitlab-ci: Add cross-compiling build tests
  stubs: Move qemu_fd_register stub to util/main-loop.c
  stubs: Move qemu_timer_notify_cb() and remove qemu_notify_event() stub
  configure: Allow automatic WHPX detection
  dockerfiles/debian-win64-cross: Download WHPX MinGW headers
  tests/Makefile: test-image-locking needs CONFIG_POSIX
  tests: Fixes building test-util-filemonitor.c on msys2/mingw
  tests: fixes test-vmstate.c compile error on msys2
  tests: handling signal on win32 properly
  tests/docker: add python3-setuptools the docker images

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