Match the linux build configuration on openbsd and freebsd.
Match the linux build configuration on openbsd and freebsd.

R=jochen@chromium.org, thakis@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1919283007
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#392252}

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