criu: Version 1.8

So, first of all we've fixed (I hope) the security issues
spotted by RedHat people. Another big thing of this release
is the huge amount of bug fixes found while testing live
migration. And enhancements for live migration itself is
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile

 VERSION_MAJOR		:= 1
-VERSION_MINOR		:= 7
+VERSION_MINOR		:= 8
 VERSION_SUBLEVEL	:=
 VERSION_EXTRA		:=
 VERSION_NAME		:=