[PATCH] libpayload: rename config.h to libpayload-config.h

[PATCH] libpayload: rename config.h to libpayload-config.h

Rename the generated config file to libpayload-config.h to differenciate
it from other config.h files.  Move the default location of the file to
$(src)/include so that LIBPAYLOAD_PREFIX= users can access the file
without staging it.

Signed-off-by: Jordan Crouse <jordan@cosmicpenguin.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3768 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1