* test/rubygems/test_gem_package.rb: avoid tempfile leaks using Tempfile#close!
* test/rubygems/test_gem_request_set.rb: ditto.
* test/rubygems/test_gem_request_set_gem_dependency_api.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46684 b2dd03c8-39d4-4d8f-98ff-823fe69b080e