Temporarily add kotlin builder to r8 console

I will create a seperate console when we have this working

Change-Id: I2872e8066974ebda3b3ac84fe8a5778430e341b8
diff --git a/infra/config/global/luci-milo.cfg b/infra/config/global/luci-milo.cfg
index e76751b..906a427 100644
--- a/infra/config/global/luci-milo.cfg
+++ b/infra/config/global/luci-milo.cfg
@@ -190,5 +190,9 @@
     category: "win release"
     short_name: "win"
   }
-
+  builders {
+    name: "buildbucket/luci.r8.ci/kotlin-builder"
+    category: "kotlin"
+    short_name: "kotlin_builder"
+  }
 }