[Buildroot] issues with svn version

[Ulf Samuelsson <ulf@atmel.com>]

> following up to myself.  i changed the destination to be the staging area, 
> but it still failed.  looking closer i see that the issue was the compound 
> command to check for the existence of asm-generic is the last part of the 
> if clause so it becomes the return value and since asm-generic doesn't 
> exist for me, that is false.  for now i have hacked a - on the front of 
> the if, but that's probably not the best solution, but things are building 
> much better now.  not finished yet, but things are flying by...
> 

Might not be related, but I have noticed that 
a lot of the makefile fragments in the packages/* directories
does not set CFLAGS to include the kernel headers, and
this cause rebuilds to fail, typically when trying to include 
asm-generic.h

Best Regards
Ulf Samuelsson