Steve Anton 0f1a7ba23c Thread safe crc32 table initialization
The lazy generated table was not entirely thread safe under the
C++ (11) memory model, as pointed out by TSAN.

Bug: webrtc:10627
Change-Id: I0fe1cc7c10ca218a92c710a6382b64d7827f3a6a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/136980
Reviewed-by: Amit Hilbuch <amithi@webrtc.org>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27954}
2019-05-15 23:54:07 +00:00
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