Wip/martyn/u boot installer

Jenkinsfile

@@ -613,9 +613,14 @@ buildCandidates.each { name, arch ->
 }
 
 /* Add installer */
-first_pass << [("$name $type"):
-	buildInstallers(installers)
-]
+println("buildOnlyList")
+println(buildOnlyList)
+if (buildOnlyList.containsKey('installers')) {
+  println("Got installers")
+  first_pass << [("installers"):
+      buildInstallers(installers)
+  ]
+}
 
 parallel first_pass
 parallel second_pass