update name of code to labcodes

labcodes/lab8/user/sleepkill.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <ulib.h>
+
+int
+main(void) {
+    int pid;
+    if ((pid = fork()) == 0) {
+        sleep(~0);
+        exit(0xdead);
+    }
+    assert(pid > 0);
+
+    sleep(100);
+    assert(kill(pid) == 0);
+    cprintf("sleepkill pass.\n");
+    return 0;
+}
+