Merge "Nullability check for getopt module" am: f6f8315747

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2482938

Change-Id: Ic77c35e0a615b19276c92e79c095265cf7274dbc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>