Added swapoff() tests from Aniruddha Marathe.
diff --git a/runtest/syscalls b/runtest/syscalls
index 5b49a18..9dc43a6 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -749,6 +749,9 @@
 
 string01 string01
 
+swapoff01 swapoff01
+swapoff02 swapoff02
+
 symlink01 symlink01
 symlink02 symlink02
 symlink03 symlink03