add powerpc and z to rebuild labels

Signed-off-by: Victor Vieux <victorvieux@gmail.com>

poule.yml

@@ -70,6 +70,11 @@
             configurations: [ janky ],
             label:          "rebuild/janky",
         }
+      - type:       rebuild
+        settings: {
+            configurations: [ powerpc ],
+            label:          "rebuild/powerpc",
+        }
       - type:       rebuild
         settings: {
             configurations: [ userns ],
@@ -90,3 +95,8 @@
             configurations: [ windowsRS1 ],
             label:          "rebuild/windowsRS1",
         }
+      - type:       rebuild
+        settings: {
+            configurations: [ z ],
+            label:          "rebuild/z",
+        }