net:cmsg_ipv6.sh from ubuntu_kernel_selftests flaky with J-lowlatency-hwe-6.2

[Po-Hsu Lin]

Issue found on J-lowlatency-hwe-6.2/6.2.0-1013.13~22.04.1 with ARM64 node howzit-kernel

This test seems to be flaky, failed on retrying the test.

 Running 'make run_tests -C net TEST_PROGS=cmsg_ipv6.sh TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
 make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'
 TAP version 13
 1..1
 # selftests: net: cmsg_ipv6.sh
 # Case TCLASS ICMP cmsg - packet data returned 1, expected 0
 # FAIL - 1/93 cases failed
 not ok 1 selftests: net: cmsg_ipv6.sh # exit=1
 make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'