[PATCH] DTC: Add support for a C-like #include "file" mechanism.

[Jon Loeliger]

So, like, the other day Jon Loeliger mumbled:
> 
> Keeps track of open files in a stack, and assigns
> a filenum to source positions for each lexical token.
> Modified error reporting to show source file as well.
> No policy on file directory basis has been decided.
> Still handles stdin.
> 
> Tested on all arch/powerpc/boot/dts DTS files
> 
> Signed-off-by: Jon Loeliger <jdl at freescale.com>

Applied.

Er, thanks,
jdl