Wip/martyn/u boot installer

Jenkinsfile

@@ -612,10 +612,14 @@ buildCandidates.each { name, arch ->
     }
 }
 
-/* Add installer */
-first_pass << [("$name $type"):
-	buildInstallers(installers)
-]
+println("buildOnlyList:")
+println(buildOnlyList)
+if (buildOnlyList.containsValue("installers")) {
+  /* Add installer */
+  first_pass << [("$name $type"):
+      buildInstallers(installers)
+  ]
+}
 
 parallel first_pass
 parallel second_pass