Merge "Sync upstream OpenBSD stdio." into main am: 1bcebdae38 am: 865d80a22f am: 728bd30de8

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

Change-Id: I3dd55a45923071fefa8890dceb3b1f70b2d9db50
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>