linux emulation package updates - update howto

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Btw, if you're missing anything, here's how to convert suse131
packages to suse15:

cd /usr/pkgsrc/emulators
cp -r suse131_foo suse15_foo
cd suse15_foo
vi Makefile:
- replace the string 'RPMUPDPKG' with 'RPMPKG', if any (there are no
  update packages for this release yet)
- reset PKGREVISION
- update the list of packages (rpm files), finding out the new version
  numbers by browsing
  http://ftp5.gwdg.de/pub/opensuse/distribution/leap/15.5/repo/oss/x86_64/
- replace .include "../../emulators/suse131_linux/Makefile.common"
  with .include "../../emulators/suse15_linux/Makefile.common"

'make mdi' and 'make install', check the newly installed files using
'ldd' from suse15_binutils to find out if any library dependencies are
missing.

Add an entry for the new package in suse15_linux/emulator.mk

Done!
 Thomas