Fix gn gen failure on arm64 cause by boringssl
Fix gn gen failure on arm64 cause by boringssl

BUG=577492
TBR=agrieve
NOTRY=true
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1588723004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#369310}

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