[code coverage] Add fuzzer corpus as fuzzer target dependency

This CL adds the correspoding fuzzer corpus as a data dependecy of the
fuzzer target so that mb knows how to isolate the corpus.

Bug: 919565
Change-Id: I006df68b62a2337923f9d11d7badec8460f7106f
Reviewed-on: https://chromium-review.googlesource.com/c/1403681
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621366}
1 file changed