Update luci-go isolate.sha1 files

BUG=skia:6611

Change-Id: Ide847c4370f9fde959aec8723d9145791576460a
Reviewed-on: https://skia-review.googlesource.com/20448
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
3 files changed