Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* bug fixes for Win32 event loop
* bug fixes for -Wextra
* fix gdb XML for 32-bit x86
* improve error handling for module load

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu

:
  accel: abort if we fail to load the accelerator plugin
  dmg: warn when opening dmg images containing blocks of unknown type
  module: add Error arguments to module_load and module_load_qom
  module: rename module_load_one to module_load
  module: removed unused function argument "mayfail"
  Add missing include statement for global xml_builtin
  meson: avoid unused arguments of main() in compiler tests
  Fix broken configure with -Wunused-parameter
  gdb-xml: Fix size of EFER register on i386 architecture when debugged by GDB
  util/aio-win32: Correct the event array size in aio_poll()
  util/main-loop: Avoid adding the same HANDLE twice
  util/main-loop: Fix maximum number of wait objects for win32

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>