debug LSAN failures

See the bot Test-Debian10-Clang-NUC7i5BNK-GPU-IntelIris640-x86_64-Debug-All-ASAN_Vulkan,
e.g. https://logs.chromium.org/logs/skia/4e5d9ebd8ab31111/+/steps/symbolized_dm/0/stdout

Change-Id: I4eb6da45ca74b43e44f4eed95568c174b28f5838
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/314137
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
5 files changed