Symbolize JSON output snippets in swarming ASan runs.
Symbolize JSON output snippets in swarming ASan runs.

This mirrors an earlier change to non-swarming runs:
https://codereview.chromium.org/810643006/

BUG=372458
R=vadimsh@chromium.org

Review URL: https://codereview.chromium.org/865853009

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#313793}

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