[libc builder] Add benchmark util tests step to release builder

[PaulkaToast]

Summary

Run the benchmark utils tests on release builder to prevent benchmark utils from getting stale.

zorg/buildbot/builders/annotated/libc-linux.py

if not args.asan:
         with step('Loader Tests'):
             run_command(['ninja', 'libc_loader_tests'])
         with step('AOR Tests'):
             aor_dir = os.path.join(source_dir, 'libc', 'AOR_v20.02')
             # Remove the AOR build dir.
             util.clean_dir(os.path.join(aor_dir, 'build'))
             run_command(['make', 'check'], directory=aor_dir)
 
+    if not args.debug:
+        with step('Benchmark Utils Tests'):
+            run_command(['ninja', 'libc-benchmark-util-tests'])
+
 
 @contextmanager
 def step(step_name, halt_on_fail=False):
     util.report('@@@BUILD_STEP {}@@@'.format(step_name))
     if halt_on_fail:
         util.report('@@@HALT_ON_FAILURE@@@')
     try:
         yield