Old linux (at least CentOS 5.6, kernel 2.6.18) wakes up 4.99 sec.
	* test/ruby/test_sleep.rb (TestSleep#test_sleep_5sec): syntax error.

	* test/ruby/test_sleep.rb (TestSleep#test_sleep_5sec): call uname
	  only on linux because it's a workaround for linux only.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@35238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e