Makefile.inc: Update end-of-build targets

The end-of-build targets weren't very granular previously, so warnings
could be lost instead of being printed at the end of the build.

This separates the end-of-build targets into 4 different groups, in this
order:
- build_complete: The coreboot build itself is done
- files_added: All files have been added to CBFS
- show_coreboot: Display any normal coreboot build messages
- show_notices: Display any warnings or notes

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Ia67446f164b8e66415a1a8c196999316fdf39f1e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79382
Reviewed-by: Patrick Georgi <patrick@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

0 files changed, 0 insertions, 0 deletions