Merge pull request #865 from liujinhui-job/fix-syscall-compile-error

fix compile syscall directory compile issue

Author: jfb8856606

adapter/syscall/Makefile

@@ -1,4 +1,4 @@
-TOPDIR=..
+TOPDIR=../..
 
 ifeq ($(FF_PATH),)
 	FF_PATH=${TOPDIR}

adapter/syscall/ff_hook_syscall.c

@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <time.h>
 #include <unistd.h>
+#include <pthread.h>
 
 #include <rte_malloc.h>
 #include <rte_memcpy.h>