Revert "[Hotfix] 2.5.1-pre.13 hot fix on Async.js"

This reverts commit 13e581d105d82cb47b0efa282a6f9b809acc1771.
[Hotfix] 2.5.1-pre.3 hot fix on Async.js

Adding missed assignment.

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com