pipe: add a separate file for pipe's stuff

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile

@@ -42,6 +42,7 @@ OBJS		+= log.o
 OBJS		+= libnetlink.o
 OBJS		+= sockets.o
 OBJS		+= files.o
+OBJS		+= pipes.o
 OBJS		+= file-ids.o
 OBJS		+= namespaces.o
 OBJS		+= uts_ns.o

pipes.c

+#include "crtools.h"
+#include "image.h"
+#include "files.h"
+