infect: Introduce skeleton for soon-to-be compel code

We'll collect the compel code here and will move all these
files into compel library by the last patch of this set.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/Makefile.crtools

@@ -3,6 +3,7 @@ ccflags-y		+= -iquote compel/plugins/include
 ccflags-y		+= -iquote compel/include
 ccflags-y		+= -iquote compel/arch/$(ARCH)/plugins/std
 
+obj-y			+= infect.o
 obj-y			+= action-scripts.o
 obj-y			+= external.o
 obj-y			+= aio.o

criu/include/infect.h

+#ifndef __COMPEL_INFECT_H__
+#define __COMPEL_INFECT_H__
+#endif

criu/infect.c

+#include "infect.h"