[unification] Update another label for async-default library.

Bug: 36548
Change-Id: I3d80244576cc9f5607bda11ecedf214f27115630
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/Vulkan-Loader/+/391094
Reviewed-by: Shai Barack <shayba@google.com>
Reviewed-by: John Rosasco <rosasco@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index de71b26..a197ec7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -172,7 +172,7 @@
       runtime_deps = [ "//zircon/public/lib/fdio:fdio_sdk" ]
 
       # TODO(MA-488): remove this too
-      runtime_deps += [ "//zircon/public/lib/async-default:async-default_sdk" ]
+      runtime_deps += [ "//zircon/system/ulib/async-default:async-default_sdk" ]
 
       # TODO(MA-488): The //zircon/public/lib/async-default dep gives us a dep
       # on //zircon/public/lib/async, which uses the C++ standard library and