tests/kms_flip: Check for link reset during expired seq vblank wait

The expired vblank seq subtests can fail when using certain monitors with a
behavior described in

commit 60e8be7c
Author: Imre Deak <imre.deak@intel.com>
Date:   Mon May 11 22:08:53 2020 +0300

    tests/kms_flip: Retry test in case of a DP/HDMI link reset

As in the above commit, retry the test once if a hotplug was detected during
the test.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
26 jobs for master in 9 minutes and 19 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build Containers
passed #3462927
build-containers:build-debian

00:00:38

passed #3462929
build-containers:build-debian-arm64

00:00:24

passed #3462928
build-containers:build-debian-armhf

00:00:24

passed #3462930
build-containers:build-debian-mips

00:00:22

passed #3462931
build-containers:build-fedora

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  Build
passed #3462941
build:tests-debian-autotools

00:07:42

passed #3462936
build:tests-debian-meson

00:01:05

passed #3462939
build:tests-debian-meson-arm64

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passed #3462938
build:tests-debian-meson-armhf

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passed #3462940
build:tests-debian-meson-mips

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passed #3462937
build:tests-debian-minimal

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passed #3462932
build:tests-fedora

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passed #3462935
build:tests-fedora-clang

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passed #3462933
build:tests-fedora-no-libunwind

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passed #3462934
build:tests-fedora-oldest-meson

00:00:57

 
  Test
passed #3462949
test:list-undocumented-tests

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passed #3462942
test:ninja-test

00:00:41

passed #3462945
test:ninja-test-arm64

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passed #3462946
test:ninja-test-armhf

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passed #3462943
test:ninja-test-clang

00:00:41

passed #3462944
test:ninja-test-minimal

00:00:32

passed #3462947
test:ninja-test-mips

00:00:54

failed #3462948
test:test-list-diff

00:00:15

passed #3462950
test:verify-blacklists

00:00:39

 
  Containers
skipped #3462951
containers:igt
 
  Deploy
skipped #3462952
allowed to fail manual
pages
 
Name Stage Failure
failed
test:test-list-diff Test
Downloading artifacts for build:tests-debian-autotools (3462941)...
Downloading artifacts from coordinator... ok
id=3462941 responseStatus=200 OK token=pY24Br49
Downloading artifacts for build:tests-debian-meson (3462936)...
Downloading artifacts from coordinator... ok
id=3462936 responseStatus=200 OK token=hbkwdfb4
Executing "step_script" stage of the job script
$ diff <(sed "s/ /\n/g" meson-test-list.txt| grep -v 'vc4\|v3d\|panfrost' | sort) <(sed "s/ /\n/g" autotools-test-list.txt | sort)
10d9
< api_intel_bb
ERROR: Job failed: exit code 1