configure.in: setjmpex
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40814 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: setjmpex
workaround for i686-w64-mingw32 which declares it but lacks its
definition.
is available.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40814 b2dd03c8-39d4-4d8f-98ff-823fe69b080e