[PATCH] libpayload: Use gcc to compile assembly files

[PATCH] libpayload:  Use gcc to compile assembly files

Using gcc to compile assembly files lets us use preprocessor
directives.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Patrick Georgi <patrick.georgi@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3671 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1