abuild:

abuild:
- increase context to 6 lines in case of build error
- add update mechanism to automatically produce fallback+normal in one image.
- tighten up output
- in-coreboot-builds makefile main target is now "all" as coreboot.rom matches
  a file
- time measurement now includes "make config" step
- actually allow long-implemented long version of --remove|-r option.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5328 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1