[test] Fix status file.

BUG=v8:5161
NOTRY=true
NOTREECHECKS=true
TBR=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2111483002
Cr-Commit-Position: refs/heads/master@{#37363}

test/cctest/cctest.status

@@ -124,7 +124,7 @@
   'test-cpu-profiler/DeoptUntrackedFunction': [PASS, NO_VARIANTS],
 
   # BUG(v8:5161): Flaky with turbofan.
-  'test-thread-termination/TerminateAndReenterFromThreadItself': [PASS, ['system == mac', NO_VARIANTS]],
+  'test-thread-termination/TerminateAndReenterFromThreadItself': [PASS, ['system == macos', NO_VARIANTS]],
 
   ############################################################################
   # Slow tests.