Thread#backtrace_locations is not supported

[deepj]

This method is available since Ruby 2.2

To reproduce

Thread.current.backtrace_locations

Error:

NoMethodError: undefined method `backtrace_locations' for Thread:Class
	from (irb):1
	from ~/.rubies/truffleruby-1.0.0-rc11/bin/irb:29:in `<main>'

[chrisseaton]

"Returns any backtrace associated with the exception. This method is similar to #backtrace, but the backtrace is an array of Thread::Backtrace::Location."

[deepj]

@eregon this is already implemented so it can be closed