Update num_cpus to 1.13.1 am: 1c54293d6f am: d8658ce468 am: a3ef2ca366 am: 9f8910ae86

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num_cpus/+/2005973

Change-Id: I754e9cc4eba96a5498d7ef83f729471647816d69