Copy latest config.guess from latest PostgreSQL

[hanefi]

This file is used to guess the configuration name of the system. To keep it up-to-date with PostgreSQL, I copied the latest file from PostgreSQL codebase.

Closes: #5383

[codecov[bot]]

Codecov Report

Merging #5565 (39d9893) into master (479b2da) will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5565   +/-   ##
=======================================
  Coverage   92.69%   92.69%           
=======================================
  Files         219      219           
  Lines       45995    45995           
=======================================
+ Hits        42636    42637    +1     
+ Misses       3359     3358    -1