Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2021-01-11v2' into staging

* Fuzzer improvements
* Add OpenSUSE leap to the gitlab-CI
* Some fixes to get our CI "green" again
* Some initial patches to update bsd-user

# gpg: Signature made Mon 11 Jan 2021 14:00:07 GMT
# 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-2021-01-11v2:
  fuzz: map all BARs and enable PCI devices
  tests/acceptance: Fix race conditions in s390x tests & skip fedora on gitlab-CI
  bsd-user: Update strace.list for FreeBSD's latest syscalls
  bsd-user: move strace OS/arch dependent code to host/arch dirs
  bsd-user: regenerate FreeBSD's system call numbers
  fuzz: heuristic split write based on past IOs
  fuzz: add minimization options
  fuzz: set bits in operand of write/out to zero
  fuzz: remove IO commands iteratively
  fuzz: split write operand using binary approach
  fuzz: double the IOs to remove for every loop
  fuzz: accelerate non-crash detection
  util/oslib-win32: Fix _aligned_malloc() arguments order
  qtest/libqtest: fix heap-buffer-overflow in qtest_cb_for_every_machine()
  gitlab-ci.yml: Add openSUSE Leap 15.2 for gitlab CI/CD

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