ostree: Add naggy comments to help keep options in sync

/* ATTENTION:
 * Please remember to update the bash-completion script (bash/ostree) and
 * man page (man/ostree-$COMMANDNAME.xml) when changing the option list.
 */

Closes: #1080
Approved by: cgwalters

src/ostree/ot-builtin-cat.c

@@ -29,6 +29,11 @@
 
 #include <gio/gunixoutputstream.h>
 
+/* ATTENTION:
+ * Please remember to update the bash-completion script (bash/ostree) and
+ * man page (man/ostree-cat.xml) when changing the option list.
+ */
+
 static GOptionEntry options[] = {
   { NULL },
 };