Refactored using Method#owner.
proc.c: super_method of included method
* proc.c (method_super_method): search the next super method along
the included ancestor chain. [ruby-core:83114] [Bug #13973]
* vm_method.c (rb_callable_method_entry_without_refinements):
return the defined class.
merge revision(s) 58245,60127: [Backport #13973]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@62865 b2dd03c8-39d4-4d8f-98ff-823fe69b080e