Add -Wtautological-unsigned-zero-compare to bpf_cc_defaults am: 6a162d7dab

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/3555903

Change-Id: I2a0e09799bbb22dc43c3d7e10fe950db481fae04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>