Make syscall_test_runner binary testonly.
Make syscall_test_runner binary testonly.

PiperOrigin-RevId: 228945914
Change-Id: Idfa0a3c27434655b5f9ac241f1726e0bc9ef0392

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor