[unification] Update label for async-loop libraries.

Bug: 36548
Change-Id: I7caedd0258f654f82402bfa3d321bb0d031b7c9d
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/leveldb/+/390632
Reviewed-by: Shai Barack <shayba@google.com>
Commit-Queue: P.Y. Laligand <pylaligand@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index a20d03e..ea76367 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -133,12 +133,12 @@
     "//third_party/snappy",
     "//zircon/public/lib/async",
     "//zircon/public/lib/async-cpp",
-    "//zircon/public/lib/async-loop-cpp",
-    "//zircon/public/lib/async-loop-default",
     "//zircon/public/lib/fdio",
     "//zircon/public/lib/fit",
     "//zircon/public/lib/zx",
     "//zircon/system/fidl/fuchsia-io",
+    "//zircon/system/ulib/async-loop:async-loop-cpp",
+    "//zircon/system/ulib/async-loop:async-loop-default",
     "//zircon/system/ulib/syslog",
   ]