vim-patch:8.0.0437

Problem:    The packadd test does not create the symlink correctly and does
            not test the right thing.
Solution:   Create the directory and symlink correctly.

644df41c44

src/nvim/version.c

@@ -515,7 +515,7 @@ static const int included_patches[] = {
   // 440,
   // 439,
   // 438,
-  // 437,
+  437,
   // 436,
   // 435,
   // 434,