[Truffle] Pass rb_str_new specs.
[Truffle] Pass rb_str_new specs.

* String.new(java_string) should return a binary string.

nobu/rubyspec,ruby/rubyspec,nobu/rubyspec,kachick/rubyspec,ruby/spec,sgarciac/spec,sgarciac/spec,kachick/rubyspec,eregon/rubyspec,ruby/spec,eregon/rubyspec,nobu/rubyspec,sgarciac/spec,ruby/rubyspec,eregon/rubyspec,ruby/spec,kachick/rubyspec