Commit 9692c7b037 for qemu.org

commit 9692c7b0373677badcf8bb299ab8e2597244d436
Merge: 1b7dabccd0 a2e5bbf0c4
Author: Peter Maydell <peter.maydell@linaro.org>
Date:   Thu Apr 8 11:39:53 2021 +0100

    Merge remote-tracking branch 'remotes/stsquad/tags/pull-6.0-rc2-fixes-060421-1' into staging

    Testing updates:

      - fix x86_64 cross compilers
      - don't use registry for non-x86 containers
      - add valid host types for given cross compile containers
      - clean up i386 code16 test with explicit -no-pie
      - relax sha1.py gdbstub test
      - add more gdbstub documentation
      - remove annoying warning on gitlab
      - test dtrace backend in gitlab

    # gpg: Signature made Tue 06 Apr 2021 15:55:53 BST
    # gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
    # gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
    # Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

    * remotes/stsquad/tags/pull-6.0-rc2-fixes-060421-1:
      gitlab-ci.yml: Test the dtrace backend in one of the jobs
      gitlab-ci.yml: Fix the filtering for the git submodules
      docs/system/gdb.rst: Document how to debug multicore machines
      docs/system/gdb.rst: Add some more heading structure
      tests/tcg: relax the next step precision of the gdb sha1 test
      tests/tcg/i386: force -fno-pie for test-i386
      tests/tcg/i386: expand .data sections for system tests
      tests/tcg/configure.sh: make sure we pick up x86_64 cross compilers
      tests/tcg: add concept of container_hosts
      tests/docker: don't set DOCKER_REGISTRY on non-x86_64
      tests/tcg: update the defaults for x86 compilers

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