Comment 0 for bug 1788351

This is a new test. It has passed on Trusty but failed on X/B

<<<test_start>>>
tag=bind03 stime=1534863126
cmdline="bind03"
contacts=""
analysis=exit
<<<test_output>>>
tst_test.c:1017: INFO: Timeout per run is 0h 05m 00s
bind03.c:48: FAIL: expected EINVAL: EADDRINUSE

Summary:
passed 0
failed 1
skipped 0
warnings 0
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=1 corefile=no
cutime=0 cstime=0
<<<test_end>>>

From the commit message of this test:
    With 0fb44559ffd6 ("af_unix: move unix_mknod() out of bindlock")
    the behavior of bind() for STREAM UNIX sockets changed in
    case a socket that is already bound is passed to bind() again.

    This testcase fails for the new behavior and passes for the
    old one.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-1032-kvm 4.4.0-1032.38
ProcVersionSignature: User Name 4.4.0-1032.38-kvm 4.4.140
Uname: Linux 4.4.0-1032-kvm x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Wed Aug 22 07:33:43 2018
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)