fix commit miss

* ext/win32/lib/win32/importer.rb: miss to add at r41936.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42109 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/win32/lib/win32/importer.rb

@@ -0,0 +1,14 @@
+begin
+  require 'fiddle/import'
+  importer = Fiddle::Importer
+rescue LoadError
+  require 'dl/import'
+  importer = DL::Importer
+end
+
+module Win32
+end
+
+Win32.module_eval do
+  Importer = importer
+end