layer23 vty: fix prompts: insert space after '#'

"All" our VTY prompts have a space after the prompt.
Also do that for '(ms)', '(test-sim)' and '(support)' prompts.

Change

  OsmocomBB(ms)#exit

to

  OsmocomBB(ms)# exit

Change-Id: Id437279e0fa9845630a306958b404efa3b94b492

src/host/layer23/src/mobile/vty_interface.c

@@ -55,19 +55,19 @@ extern struct llist_head active_connections;
 
 struct cmd_node ms_node = {
 	MS_NODE,
-	"%s(ms)#",
+	"%s(ms)# ",
 	1
 };
 
 struct cmd_node testsim_node = {
 	TESTSIM_NODE,
-	"%s(test-sim)#",
+	"%s(test-sim)# ",
 	1
 };
 
 struct cmd_node support_node = {
 	SUPPORT_NODE,
-	"%s(support)#",
+	"%s(support)# ",
 	1
 };