This lets us run bssl speed at least. bssl client is currently compiled
out until we clean up our socket story on Windows and get it working.

Change-Id: Ib1dc0d0e0a6eed7544207e7bbe138503731fda67
Reviewed-on: https://boringssl-review.googlesource.com/2103
Reviewed-by: Adam Langley <agl@google.com>