bare_instructions.rb: show class name on inspect

as it's helpful for debugging.

I'm not sure what's the good output for RubyVM::TraceInstructions, so I
left it as it is.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62068 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/ruby_vm/models/bare_instructions.rb

@@ -115,7 +115,7 @@ class RubyVM::BareInstructions
   end
 
   def inspect
-    sprintf "#<%s@%s:%d>", @name, @loc[0], @loc[1]
+    sprintf "#<%s %s@%s:%d>", self.class.name, @name, @loc[0], @loc[1]
   end
 
   private