test_rubyoptions.rb: split regexps

* test/ruby/test_rubyoptions.rb (SEGVTest::ExpectedStderrList):
  split backtrace information regexps.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47927 b2dd03c8-39d4-4d8f-98ff-823fe69b080e