scripts: Update rfc.sh to check existance of Change-Id in backports

Addition to this script is a no-op on master.

This would need to be backported to active release branches to be
effective.

This check is not smart proof, in that someone could proceed knowing
that the Change-Id differs from master, but this is not expected to
catch that, instead it is to serve more as a reminder that we need
the same Change-Id across branches.

Contributors not using rfc.sh would not see this, but they are few
and possibly far in between. Also contributors using gerrit to
cherry-pick changes will not see this. For both cases a server side
solution to catch any changes are needed.

There is a possiblilty that we will follow this up with a check
on the gerrit end and add a comment to the reviews, to aid reviewers
to quickly check the sanity of the Change-Id when it differs.

> BUG: 1428047
> Signed-off-by: Shyam <srangana@redhat.com>
> Reviewed-on: https://review.gluster.org/17004
> Smoke: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Niels de Vos <ndevos@redhat.com>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
> Reviewed-by: Amar Tumballi <amarts@redhat.com>

Change-Id: I11e371489a4a3cf2ff96d9892256986cd535998b
BUG: 1440810
Signed-off-by: Shyam <srangana@redhat.com>
Reviewed-on: https://review.gluster.org/17031
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>

0 files changed, 0 insertions, 0 deletions