bin: Add Tested-by in rb.py

We already have a nice script, let's add the only missing option here.

Signed-off-by: Mary Guillemard <mary@mary.zone>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40932>

bin/rb.py

@@ -76,6 +76,7 @@ if __name__ == "__main__":
                         description='Add review trailers')
     parser.add_argument('person', nargs='+', help="Reviewer's username, first name, or full name")
     parser.add_argument('-a', '--ack', action='store_true', help="Apply an acked-by tag")
+    parser.add_argument('-t', '--test', action='store_true', help="Apply an tested-by tag")
     parser.add_argument('-d', '--dry-run', action='store_true',
                         help="Print trailer without applying")
     parser.add_argument('-r', '--rebase', nargs='?',
@@ -88,6 +89,8 @@ if __name__ == "__main__":
         relevant_args = [sys.argv[0]]
         if args.ack:
             relevant_args.append("--ack")
+        elif args.test:
+            relevant_args.append("--test")
 
         relevant_args += args.person
 
@@ -107,7 +110,12 @@ if __name__ == "__main__":
         if person is None:
             print(f'Could not uniquely identify {p}, skipping')
 
-        trailer = 'Acked-by' if args.ack else 'Reviewed-by'
+        trailer = 'Reviewed-by'
+        if args.ack:
+            trailer = 'Acked-by'
+        elif args.test:
+            trailer = 'Tested-by'
+
         trailer = f'{trailer}: {person[0]} <{person[1]}>'
 
         if args.dry_run: