Various minor fixes (trivial).

 - More license header cosmetics.

 - New official "Building coreboot" document is now at:
   http://www.coreboot.org/Build_HOWTO

 - Drop "(mostly those derived from the Linux kernel)" part of the GPL-v2-only
   parts from the README. Many other files are also GPL-v2-only, too.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5161 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1