pts/seccomp: move to NATIVE_TEST

I was using audio tests as an example, but seccomp is much
simpler. Instead, use brillo_Gtests as the test-runner, and move
seccomp_bpf_test to /data/nativetest instead.

Additionally, clean up Clang warnings.

Bug: 24619824

Change-Id: Id7ba4eb5c44ece22afa926c928470fa2f0557db4
Signed-off-by: Kees Cook <keescook@google.com>
3 files changed