Damien Neil e59e128f90 os: add Root.MkdirAll
For #67002

Change-Id: Idd74b5b59e787e89bdfad82171b6a7719465f501
Reviewed-on: https://go-review.googlesource.com/c/go/+/674116
Reviewed-by: Alan Donovan <adonovan@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-21 10:14:43 -07:00
..
2025-02-03 08:38:43 -08:00
2025-05-21 10:14:43 -07:00