* test/ruby/test_settracefunc.rb: add tests for a_call/a_return
  by Brandur <brandur@mutelight.org> [Feature #9120]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e