* include/ruby/ruby.h (RUBY_EVENT_SPECIFIED_LINE): make it special.
  This flag is not contained by RUBY_EVENT_TRACEPOINT_ALL.
  This event is experimental one. It is possible to remove/rename
  flag name after 2.0.1.
* vm_trace.c (get_event_id): return :line if SPECIFIED_LINE was
  occurred. `:specified_line' never been returned.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38728 b2dd03c8-39d4-4d8f-98ff-823fe69b080e