build: update Windows icon to Feb 2016 rebrand

PR-URL: #28524
Fixes: #27934
Reviewed-By: Roman Reiss <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: mikemaccana