Merge tag 'pull-request-2024-01-16' of https://gitlab.com/thuth/qemu into staging

* Improve the timeouts for some problematic qtests
* Enable some ROP mitigation compiler switches

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# gpg: Signature made Tue 16 Jan 2024 07:45:57 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

* tag 'pull-request-2024-01-16' of https://gitlab.com/thuth/qemu:
  meson: mitigate against use of uninitialize stack for exploits
  meson: mitigate against ROP exploits with -fzero-call-used-regs
  qtest: Bump npcm7xx_watchdog_timer-test timeout to 2 minutes
  tests/qtest/npcm7xx_watchdog_timer: Only test the corner cases by default
  tests/qtest/meson.build: Bump the boot-serial-test timeout to 4 minutes

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