Fix Libfuzzer Upload Linux buildbot.
Fix Libfuzzer Upload Linux buildbot.

Use the new GN option added in
https://codereview.chromium.org/1539983004/

BUG=

Review URL: https://codereview.chromium.org/1567783006

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#368422}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk