hello-mod: add a module for testing module.bbclass

The following patch creates a hello-mod recipe for building a trivial
out-of-tree kernel module, hello-mod.ko. This demonstrates the hostprogs
build modifications added to module.bbclass. When loaded and unloaded,
the module prints a simple string to the console to demonstrate it was
compiled correctly.

Tested on qemux86 poky-image-sato and beagleboard poky-image-minimal
(after adding hello-mod to the images).

(From OE-Core rev: d4765569d51448e8918bb15e7ab342983344074a)

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
CC: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/hello-mod/files/hello.c

@@ -0,0 +1,33 @@
+/******************************************************************************
+ *
+ *   Copyright (C) 2011  Intel Corporation. All rights reserved.
+ *
+ *   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
+ *   the Free Software Foundation; version 2 of the License.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *****************************************************************************/
+
+#include <linux/module.h>
+
+int init_module(void)
+{
+	printk("Hello World!\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	printk("Goodbye Cruel World!\n");
+}
+
+MODULE_LICENSE("GPL");