Merge "Add a test for a recent POSIX change." am: cfb9030ff0 am: 028f3b6058

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2638673

Change-Id: I1ffbafdbbd6726ef3ddd9f660fb09e91cce01a93
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>