cpuinfo: Add "cpuinfo [dump|check]" commands, v2

On Wed, Oct 01, 2014 at 05:51:09PM +0400, Pavel Emelyanov wrote:
> > Yes, what you've been expecting?
>
> if (!strcmp(argv[optind]))
> 	return cpu_cap_check()
>
> or smth like this.

updated. So if it become confusing -- feel free to merge [1;9] and
ping me to resend the rest, or pick up from attachements.

>From 6af96ff63ac82f9566c3cba9c116dc67698c9797 Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Tue, 30 Sep 2014 18:33:40 +0400
Subject: [PATCH] cpuinfo: Add "cpuinfo [dump|check]" commands

They allow to validate cpuinfo information
without running complete dump/restore actions.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>