[test] Skip flaky cpu-profiler tests.

BUG=v8:5193
NOTRY=true
TBR=alph@chromium.org,yangguo@chromium.org

Change-Id: I9740f4504c855d9526c7b6b446965996f7c50c0c
Reviewed-on: https://chromium-review.googlesource.com/438344
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Hablich <hablich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#42952}

test/cctest/cctest.status

@@ -151,6 +151,9 @@
   'test-api/ExternalFloatArray': [SKIP],
   'test-api/Float32Array': [SKIP],
   'test-api/Float64Array': [SKIP],
+
+  # BUG(v8:5193): Flaky crash.
+  'test-sampler/LibSamplerCollectSample': [SKIP],
 }],  # 'arch == arm64 and mode == debug and simulator_run == True'
 
 ##############################################################################
@@ -220,6 +223,14 @@
   'test-serialize/PartialSerializerContext': [PASS, ['arch == x64 and mode == debug', SKIP]],
 }],  # 'system == windows'
 
+##############################################################################
+['system == macos', {
+  # BUG(v8:5193) Flaky failures.
+  'test-cpu-profiler/FunctionApplySample': [SKIP],
+  'test-cpu-profiler/JsNativeJsSample': [SKIP],
+  'test-cpu-profiler/JsNativeJsRuntimeJsSampleMultiple': [SKIP],
+}],  # 'system == macos'
+
 ##############################################################################
 ['arch == arm', {