net-test: fix nduseropt parsing when multiple are present am: 67260f7cd2 am: 21ed6691ad Original change: https://android-review.googlesource.com/c/kernel/tests/+/3326575 Change-Id: If8c5309b1f0dff888acff62fd5c61faa1c0478aa Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>