BUG #15635: some files missing

The following bug has been logged on the website:

Bug reference: 15635
Logged by: ramakrishnan r
Email address: prakash.ramakrishnan.ap@nielsen.com
PostgreSQL version: 11.1
Operating system: rhel 7.5
Description:

Hi Team,

we found below some files missing please advise me.

Not able to create the below extension can ypu suggest me the solution.

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

Regards,
Prakash.R
9551559623