gitlab: Add samus_tpl to the sjg lab

This board has two variants, one of which boots with tpl. Labgrid gets
upset when they both try to claim the same hardware, so we might need to
see if we can handle that cleanly, e.g. by making the job wait.

Signed-off-by: Simon Glass <sjg@chromium.org>

.gitlab-ci.yml

@@ -592,6 +592,12 @@ samus:
     ROLE: samus
   <<: *lab_dfn
 
+# chromebook_samus_tpl
+samus_tpl:
+  variables:
+    ROLE: samus_tpl
+  <<: *lab_dfn
+
 link:
   variables:
     ROLE: link