Explicitly set argument for use_cfi_recover introduced in:
https://codereview.chromium.org/2920963002

This retains the behavior we had in GYP:
Print useful diagnostics, but crash to make the errors show up.

Also set use_cfi_cast=true. In gyp we've set this by default:
-fsanitize=cfi-derived-cast
-fsanitize=cfi-unrelated-cast

In GN it now lives behind the use_cfi_cast flag.

NOTRY=true
TBR=vogelheim@chromium.org

Bug: chromium:726584
Change-Id: If202bc42fff3d5ff398576a114af7a7c3fb3fd2b
Reviewed-on: https://chromium-review.googlesource.com/528175Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45848}