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

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

Change-Id: I328c9789302462b2f8a15c1468a35ecb821c2929
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>