Revert "tools/vm: fix page-flags build"

This reverts commit a821ac4c.

That patch is not suitable for 3.18.
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

tools/vm/Makefile

@@ -3,7 +3,7 @@
 TARGETS=page-types slabinfo
 
 LIB_DIR = ../lib/api
-LIBS = $(LIB_DIR)/libapi.a
+LIBS = $(LIB_DIR)/libapikfs.a
 
 CC = $(CROSS_COMPILE)gcc
 CFLAGS = -Wall -Wextra -I../lib/