BUG #15714: plctl extension issue

The following bug has been logged on the website:

Bug reference:      15714
Logged by:          ramakrishnan r
Email address:      prakash.ramakrishnan.ap@nielsen.com
PostgreSQL version: 11.2
Operating system:   rhel 7.5
Description:

Hi Team,
  
I have done with installation of postgres 11.2 version using yum but am
trying to install the plctl extension am getting error please do the needful
am not able to get the rpm also.

==> psql
psql (11.2)
Type "help" for help.

AIBE01PR=# create extension plctl;
ERROR:  could not open extension control file
"/usr/pgsql-11/share/extension/plctl.control": No such file or directory
AIBE01PR=#