Update upstream cookbooks

cookbooks/build-essential/libraries/_msys_helper.rb

@@ -0,0 +1,15 @@
+module BuildEssential
+  module MsysHelper
+    #
+    # This function returns a struct representing an
+    # msys package. It has two fields: url and checksum
+    #
+    # @return [OpenStruct]
+    #
+    def msys_p(url, checksum)
+      OpenStruct.new(url: url, checksum: checksum)
+    end
+  end
+end
+
+Chef::Recipe.send(:include, BuildEssential::MsysHelper)