configure.in: default LINK_SO
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: default LINK_SO
default link command.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e