Add missing subcommands for splinter role
This change adds the missing subcommands to the list in the man page for
`splinter role`.
@@ -42,9 +42,21 @@ FLAGS
SUBCOMMANDS
===========
+`create`
+: Creates a role on a Splinter node
+
+`delete`
+: Deletes a role from a splinter node
+
`list`
: Lists the available roles for a Splinter node
+`show`
+: Shows a role on a Splinter node
+
+`update`
+: Updates a role on a Splinter node
+
SEE ALSO
========
| `splinter-role-create(1)`
