test_efi_selftest occasionally fails on qemu-x86?

Hi,

Please check the log: https://dev.azure.com/bmeng/GitHub/_build/results?buildId=302&view=logs&...

Re-run the pipeline with the same commit, the tests pass. https://dev.azure.com/bmeng/GitHub/_build/results?buildId=304&view=logs&...

There might be some instability on qemu-x86 with efi_selftest. Any ideas?

Regards, Bin