Add gbd to neovim config

pkgs/neovim/default.nix

@@ -177,10 +177,15 @@ pkgs.neovim.override {
         fzfWrapper
         fzf-vim
 
-        # Language server support
+        # non-neovim-native Language server support
         LanguageClient-neovim
         deoplete-nvim
 
+        # neovim native language server support
+        #nvim-lspconfig
+
+        nvim-gdb
+
         vim-highlightedyank
         #vim-numbertoggle