Correct spelling of a crc32c header in BUILD.gn.

Not all sources lists have been kept up to date with code
movement/removal and it seems to make some isolate steps in
cq sad for some CLs (mine).

Change-Id: I5bfe35139a41ab5d88aca564b1f7a2ded5ebab06
Reviewed-on: https://chromium-review.googlesource.com/c/1288971
Commit-Queue: Daniel Bratell <bratell@opera.com>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600818}
1 file changed