mk: skip *coreboot* same target/tree builds

this implements the previous reverted fix, but
only for coreboot.

it's done tree-wide, but individual projects must
handle it in their mkhelpers, via if_not_skip_build

if_not_skip_build *does* universally control whether
make is executed, but not make-clean.

now we can do:

./mk -b coreboot default

this will effectively do the same thing as -d,
because no config is available there. otherwise,
we try to do -b with a config, where none exists.

if noconfig is set, then we ignore this, because
no config will ever be used.

when noconfig isn't set, it is assumed that we must
always have a config for building.

Signed-off-by: Leah Rowe <leah@libreboot.org>

0 files changed, 0 insertions, 0 deletions