This patch stores the result of sysconf() in a long integer and
checks the result of Free().

Change-Id: If77e46a2f188e6bc36ef2e98eac36bf7a7d67dff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1855942Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64263}