bug#39437: guile-3.0.0: old version of guile.m4

[Klaus Stehle]

The file "./meta/guile.m4", which comes with guile-3.0.0, is the old  
version of guile-2.2
Autoconf-based packages built with guile-3.0 are installed in the  
site/2.2-directories  :-(

Line 64 of "guile.m4" looks like this:

  _guile_versions_to_search="m4_default([$1], [2.2 2.0 1.8])"

It should be turned into:

  _guile_versions_to_search="m4_default([$1], [3.0 2.2 2.0 1.8])"


Best regards
Klaus