merge revision(s) r44527: [Backport #9377]

	* vm_insnhelper.c (vm_search_super_method): when super called in a
	  bound UnboundMethod generated from a module, no superclass is
	  found since the current defined class is the module, then call
	  method_missing in that case.  [ruby-core:59619] [Bug #9377]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@45051 b2dd03c8-39d4-4d8f-98ff-823fe69b080e