Add submodule for vim-less

Syntax HL for the LESS stylsheet language

.gitmodules

 [submodule "dotfiles/vim/bundle/vim-swap"]
 	path = dotfiles/vim/bundle/vim-swap
 	url = https://github.com/kurkale6ka/vim-swap.git
+[submodule "dotfiles/vim/bundle/vim-less"]
+	path = dotfiles/vim/bundle/vim-less
+	url = https://github.com/groenewege/vim-less.git

dotfiles/vim/bundle/vim-less

+Subproject commit 902870b38df5f22803532141f11a82c74bed5ab5