Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2020-07-17' into...

Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2020-07-17' into staging

* Leak fixes
* One fix for running with --enable-werror on macOS
* Add fuzzer test to the Gitlab-CI

# gpg: Signature made Fri 17 Jul 2020 10:53:07 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-2020-07-17:
  gitlab-ci.yml: Add fuzzer tests
  qom: Plug memory leak in "info qom-tree"
  configure: Fix for running with --enable-werror on macOS
  fuzz: Expect the cmdline in a freeable GString
  tests: qmp-cmd-test: fix memory leak
  qtest: bios-tables-test: fix a memory leak

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