[infra] Fix build_task_drivers.sh, update infra dep

build_task_drivers was always syncing infra to tip-of-tree. Fix it to
use the pinned revision.

Change-Id: Iea6c54e4f62f30e986880d50b38ee0fb612a7a83
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/262217
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
8 files changed