nobu 01fb7e5b71 dtrace: wait command
* test/dtrace/helper.rb (DTrace::TestCase::READ_PROBES): wait
  the spawned command not to make a waiter thread.  fix up r55736.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55762 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2016-07-26 16:22:56 +00:00
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