The current build configuration causes AFL based fuzzers to be built
with incorrect options.

Bug: 770970
Change-Id: I712dd72a0f680df538e98622032cb13f39ed8c63
Reviewed-on: https://chromium-review.googlesource.com/707933Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>