Add a descriptive error message for kexec load failure

[Simon Horman]

On Wed, Mar 28, 2012 at 01:09:02PM -0600, Khalid Aziz wrote:
> kexec-tools package for debian includes a patch that adds a more 
> descriptive error message when someone tries to laod a crash kernel 
> and didn't remember to boot up with crashkernel= parameter. This 
> patch would be of general interest. This patch was originally written 
> by Alastair McKinstry.

Thanks for bringing this change in from the cold.

> Please apply.

Applied.