.gdbinit: super moved

* .gdbinit (rb_method_entry, rb_ancestors): `super` moved to
  RClass from rb_classext_t since r44294.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45362 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-03-19

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45363 b2dd03c8-39d4-4d8f-98ff-823fe69b080e