[arm] Fix status line to skip flaky test

TBR=mstarzinger@chromium.org

No-Try: true
Bug: v8:7976
Change-Id: I12585016afbf86e3d50bacb45a57ab20b6be72ff
Reviewed-on: https://chromium-review.googlesource.com/1148728Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54667}

test/unittests/unittests.status

@@ -18,7 +18,7 @@
 
 ['arch == arm and not simulator_run', {
   # Crashes flakily: https://crbug.com/v8/7977
-  'https://crbug.com/v8/7977': [SKIP],
+  'TurboAssemblerTest.TestCheck': [SKIP],
 }],  # arch == arm and not simulator_run
 
 ]