feat(vim-airline): Change icon shown for UNIX file format

Although it is nice to see the corresponding GNU/Linux distro logo in
the status bar; there is no relation between Debian, Fedora, Arch, etc,
and the file having UNIX line endings.

This patch anonymizes that by making the status bar show just a Tux then
the file has UNIX line-ending terminations.

nvim/init.vim

@@ -111,5 +111,6 @@ let g:airline#extensions#tagbar#flags = 'f'  " Requires majutsushi/tagbar plugin
 if exists('g:colors_name') && g:colors_name == 'vscode'
 	let g:airline_theme = 'codedark'  " vscode.nvim doesn't provide one
 endif
+let g:DevIconsEnableDistro = v:false
 
 lua require("treesitter")

vim/vimrc

@@ -102,3 +102,4 @@ let g:airline_mode_map = {
 	\ 's': 'S',
 	\ }
 let g:airline#extensions#tagbar#flags = 'f'  " Requires majutsushi/tagbar plugin
+let g:DevIconsEnableDistro = v:false