[PATCH] dtc: Fix the install target

[Jon Loeliger]

So, like, the other day Emil Medve mumbled:
> /usr/bin/install: cannot stat `fdt.h': No such file or directory
> /usr/bin/install: cannot stat `libfdt.h': No such file or directory
> 
> Signed-off-by: Emil Medve <Emilian.Medve at Freescale.com>

Applied.

jdl