Unify OBJCOPY arguments throughout various x86 stages

Instead of having to have an ifeq() all across the code base,
use $(target-objcopy). And correct target-objcopy to a value
that objcopy actually understands.

Change-Id: Id5dea6420bee02a044dc488b5086d109e806d605
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/11090
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
3 files changed