Add building for branches starting with 1 and 2

Change-Id: I460b9fa9458d0451bb6d3139f547bf6c7b77480b
diff --git a/infra/config/global/luci-scheduler.cfg b/infra/config/global/luci-scheduler.cfg
index e5bd829..9b6281b 100644
--- a/infra/config/global/luci-scheduler.cfg
+++ b/infra/config/global/luci-scheduler.cfg
@@ -57,6 +57,8 @@
   gitiles: {
     repo: "https://r8.googlesource.com/r8"
     refs: "regexp:refs/heads/d8.*"
+    refs: "regexp:refs/heads/1.*"
+    refs: "regexp:refs/heads/2.*"
   }
   triggers: "archive_release"
   triggers: "linux-android-4.0.4_release"