dump: call cpu_init() in pre-dump

It's required for dumping fpu state

[root@avagin-fc19-cr crtools]# bash  test/zdtm.sh  -d -P -i 2  static/fpu00
Execute zdtm/live/static/fpu00
./fpu00 --pidfile=fpu00.pid --outfile=fpu00.out
Dump 8411
Dump 8411
Check results 8411
01:29:30.550:  8411: FAIL: fpu00.c:78: 0.806165 != -nan
 (errno = 11 (Resource temporarily unavailable))

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
zdtm: Force lib to be built before live targets

It's ugly but should work for now. Strictly speaking
I need to rework the complete make engine used in
zdtm.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Tested-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Doc/Makefile: error out if req tools absent

Make sure we have a clear message why build it failing, as there are
repeated questions at criu@ mailing list.

Before this patch:

	[kir@kirpad Documentation]$ make
	  GEN      criu.8
	make: *** [criu.8] Error 127

After:

	[kir@kirpad Documentation]$ make
	/bin/sh: line 1: xmltos: command not found
	make: *** [check] Error 1

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