selftests/bpf: Add blah

  ./test_progs -t tc_link
  [    1.409177] tsc: Refined TSC clocksource calibration: 3407.991 MHz
  [    1.411604] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcb8dbdf, max_idle_ns: 440795301826 ns
  [    1.415577] clocksource: Switched to clocksource tsc
  [    1.430401] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.432324] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#220     tc_link_opts_after:OK
  torvalds#221     tc_link_opts_basic:OK
  torvalds#222     tc_link_opts_before:OK
  torvalds#223     tc_link_opts_both:OK
  torvalds#224     tc_link_opts_chain_classic:OK
  torvalds#225     tc_link_opts_first:OK
  torvalds#226     tc_link_opts_invalid:OK
  torvalds#227     tc_link_opts_last:OK
  torvalds#228     tc_link_opts_replace:OK
  torvalds#229     tc_link_opts_revision:OK
  Summary: 10/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>