[infra] Fix missing cache for Bookmaker

Bug: skia:
Change-Id: I12d42fa1bb364ea6c75865f72143daf92b8c12c3
Reviewed-on: https://skia-review.googlesource.com/124052
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
2 files changed