test_gem_specification.rb: skip meaningless tests
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_gem_specification.rb: skip meaningless tests
which are meaningless if syck is never possible.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e