[Ignition] Skip test.

Failed after:
https://codereview.chromium.org/1706343002

TBR=ofrobots@google.com, mattloring@google.com, rmcilroy@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1727363002

Cr-Commit-Position: refs/heads/master@{#34240}

test/cctest/cctest.status

@@ -613,6 +613,9 @@
   # TODO(rmcilroy,4680): Test assert errors.
   'test-heap-profiler/HeapSnapshotSimd': [PASS, ['mode == debug', FAIL]],
   'test-api/InitializeDefaultIsolateOnSecondaryThread1': [PASS, ['mode == debug', FAIL]],
+
+  # TODO(rmcilroy,mattloring).
+  'test-heap-profiler/SamplingHeapProfiler': [PASS, ['mode == debug', SKIP]],
 }],
 
 ]