merge revision(s) 40059,40061:

	* test/ruby/envutil.rb (assert_separately): stop_auto_run of
	  Test::Unit::Runner to prevent auto runner use ARGV.

	* test/ruby/envutil.rb (assert_separately): add $: to separate process.

	* test/ruby/envutil.rb (assert_separately): fail if stderr is not
	  empty and ignore_stderr is false.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41365 b2dd03c8-39d4-4d8f-98ff-823fe69b080e