Merge "Sync upstream OpenBSD stdio." into main am: 1bcebdae38

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2779341

Change-Id: Ie4228be69762cd999863c2311d64a798d9ef7692
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>