vim-patch:7.4.520

Problem:    Sun PCK locale is not recognzed.
Solution:   Add PCK in the table. (Keiichi Oono)

https://code.google.com/p/vim/source/detail?r=v7-4-520

src/nvim/version.c

@@ -218,7 +218,7 @@ static int included_patches[] = {
   //523 NA
   //522,
   //521,
-  //520,
+  520,
   //519,
   //518,
   //517,