Allow for storing other things in local vim directory than just swap

dotfiles/vim/vimrc

   :silent !mkdir -p ~/.vim/swap >/dev/null 2>&1
   endif
   set directory=./.vim-swap//
-  set directory+=~/.local/share/vim//
+  set directory+=~/.local/share/vim/swap//
   set directory+=~/tmp//
   set directory+=.