Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-03-08' into staging

- qtest fixes
- Some generic clean-ups by Philippe
- macOS CI testing via cirrus-ci.com

# gpg: Signature made Fri 08 Mar 2019 08:58:47 GMT
# gpg:                using RSA key 2ED9D774FE702DB5
# 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-2019-03-08:
  cirrus.yml: Add macOS continuous integration task
  tests/bios-tables: Improve portability by searching bash in the $PATH
  vhost-user-test: fix leaks
  tests: Do not use "\n" in g_test_message() strings
  hw/devices: Remove unused TC6393XB_RAM definition
  hw: Remove unused 'hw/devices.h' include
  tests: Move qdict-test-data.txt to tests/data/qobject/

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

# Conflicts:
#	tests/vhost-user-test.c