* tool/get-config_files: show downloading message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* Makefile.in (after-update): non-configure platforms don't need
  config files.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41296 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* configure.in: download missing config files.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41297 b2dd03c8-39d4-4d8f-98ff-823fe69b080e