left4me: declare /opt/left4me/src as a directory: item

bw's git_deploy item assumes the destination directory exists on the
host — its fix path runs `find <dest> -mindepth 1 -delete` to clear
existing contents before unpacking the new archive, which fails on a
fresh box where the directory was never created. Flask follows the
same pattern (bundles/flask/items.py:13).

bundles/left4me/items.py

@@ -7,6 +7,10 @@ directories = {
         'owner': 'left4me',
         'group': 'left4me',
     },
+    '/opt/left4me/src': {
+        'owner': 'left4me',
+        'group': 'left4me',
+    },
     '/etc/left4me': {
         'owner': 'root',
         'group': 'root',