Support is added via the options framework, to use 32-bit packages
must be used "PKG_OPTIONS.suse=compat32", otherwise it will use
the 64-bit packages by default.
Known packages working are opera (does not require any change in Makefile)
and rar-bin.
Tested by some, closes PR pkg/35477 by Michai Chelaru (which provided
a patch more or less than this one).
that lintpkgsrc -or doesn't want to remove all suse100_* distfiles every
time (because it looks only at "distinfo").
To make it easy to maintain these distinfo files, add a "suse100-distinfo"
target (modelled after www/opera's "opera-distinfo" target), to regenerate
the distinfo file for all supported platforms.
Discussed with tonio.
