Log Message:
Fix problem when processing simple file as
  I can't find the format file `platex.fmt'!
This change is proposed as
  http://mail-index.netbsd.org/pkgsrc-users/2017/03/25/msg024627.html
The interim fix is picking the files up from previous texlive release
and put them in files directory. And copy them after extract.
PKGREVISION++.
Tks gdt@ for OK, and tks bsh@ for finding out the problem.