Merge "Nullability check for utsname module" am: 85fc6b141e

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2478475

Change-Id: I87059a7c2f882b27672e4c2f3455eb20021645f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>