Added swapon() test created by Aniruddha Marathe.
diff --git a/runtest/syscalls b/runtest/syscalls
index 9dc43a6..eb89e6f 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -752,6 +752,8 @@
 swapoff01 swapoff01
 swapoff02 swapoff02
 
+swapon02 swapon02
+
 symlink01 symlink01
 symlink02 symlink02
 symlink03 symlink03