bash_completion: add -p|--patch|--stat support for shelve

contrib/bash_completion

@@ -629,7 +629,7 b' complete -o bashdefault -o default -o no'
 
 _hg_cmd_shelve()
 {
-    if [[ "$prev" = @(-d|--delete|-l|--list) ]]; then
+    if [[ "$prev" = @(-d|--delete|-l|--list|-p|--patch|--stat) ]]; then
         _hg_shelves
     else
         _hg_status "mard"