fix some bugs in the example kernel and the Makefile entries.

docs/multiboot.h

@@ -1,5 +1,5 @@
 /* multiboot.h - the header for Multiboot */
-/* Copyright (C) 1999  Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2001  Free Software Foundation, Inc.
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -21,7 +21,11 @@
 #define MULTIBOOT_HEADER_MAGIC		0x1BADB002
 
 /* The flags for the Multiboot header.  */
-#define MULTIBOOT_HEADER_FLAGS		0x00010003
+#ifdef __ELF__
+# define MULTIBOOT_HEADER_FLAGS		0x00000003
+#else
+# define MULTIBOOT_HEADER_FLAGS		0x00010003
+#endif
 
 /* The magic number passed by a Multiboot-compliant boot loader.  */
 #define MULTIBOOT_BOOTLOADER_MAGIC	0x2BADB002