Copy devstacklog.txt

A regression in Ib1c4476c28c5c032ed9ab1682118a4f4528db450 caused
devstacklog.txt to no longer be archived, so this restores the lost
line of code.

Change-Id: Id1ac9bd106789df662f101677dc868a60ba16a12
Merge "Copy devstacklog.txt"