win: Enable ghash by default (again)

This speeds up linking by 20%-50% (average 32%), but in return makes
obj files 7% larger. Compilation speed is not affected.

This only affects symbol_level=2 builds.

R=thakis@chromium.org

Bug: 904324
Change-Id: I800e450ef1136495593ab4523ec2f8380e3f0412
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1533167
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Reid Kleckner <rnk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642782}
1 file changed