MB-10742 Don't use close_fds param on Windows.

Because it unsupported in conjunction with redirection of
stdin/stdout/stderr.

Change-Id: I56971de546c02ea00bfdeef10749a10e81cb2d31
Reviewed-on: http://review.couchbase.org/35474
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>