new linkat test from Yi CDL Yang
diff --git a/runtest/syscalls b/runtest/syscalls
index e3b4c21..622dd5a 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -336,6 +336,9 @@
 link06 link06
 link07 link07
 
+#linkat test cases
+linkat01 linkat01
+
 listen01 listen01
 
 llseek01 llseek01