stats: Update the 40.m5threads stats.

stats: Update the 40.m5threads stats.

The change below changed the stats for the o3 version of the 40.m5threads
regression.

    commit 2367198921765848a4f5b3d020a7cc5776209f80
    Author: Brandon Potter <brandon.potter@amd.com>
    Date:   Mon Feb 27 14:10:15 2017 -0500

        syscall_emul: [PATCH 15/22] add clone/execve for threading and
        multiprocess simulations

Change-Id: I601c58d8d1453cf93f2065ea5816b63b553610e0
Reviewed-on: https://gem5-review.googlesource.com/2652
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>