Try to fix WriteMemoryBarrier() on Windows.

I suspect that WIN32_LEAN_AND_MEAN has bitten us again. Thus, including
util/atomicops.h first should hopefully work around the problem.

Fixes #59.

Change-Id: Ie1b58bf8e71ce15986c8aec3e6256b218ee4ba68
Reviewed-on: https://code-review.googlesource.com/3575
Reviewed-by: Paul Wankadia <junyer@google.com>
2 files changed