Make sure we get the LITTLE cores out of powersave

Bug: skia:7420
NOTRY=true
Change-Id: I785135a3abc17f63d715d459668c768a6014d9b3
Reviewed-on: https://skia-review.googlesource.com/87001
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
6 files changed