Update mojo sdk to rev cc531b32182099a5a034a99daff35ed5d38a61c8

mojo/edk/embedder/embedder.cc

Index: mojo/edk/embedder/embedder.cc
diff --git a/mojo/edk/embedder/embedder.cc b/mojo/edk/embedder/embedder.cc
index 9704fef73c71c7ec0a3f1b2dd21222f4a311bbae..622b3b721d248f7852638a2154a61f7b67ad96bd 100644
--- a/mojo/edk/embedder/embedder.cc
+++ b/mojo/edk/embedder/embedder.cc
@@ -208,5 +208,11 @@ MojoResult PassWrappedPlatformHandle(MojoHandle platform_handle_wrapper_handle,
   return MOJO_RESULT_OK;
 }
 
+MojoResult AsyncWait(MojoHandle handle,
+                     MojoHandleSignals signals,
+                     base::Callback<void(MojoResult)> callback) {
+  return internal::g_core->AsyncWait(handle, signals, callback);
+}
+
 }  // namespace embedder
 }  // namespace mojo