finish comments

initcode.S

@@ -17,10 +17,11 @@ exit:
   int $T_SYSCALL
   jmp exit
 
-# "/init\0"
+# char init[] = "/init\0";
 init:
   .string "/init\0"
 
+# char *argv[] = { init, 0 };
 .p2align 2
 argv:
   .long init