abuild: Update failed boards handling
- Use TARGET variable for location of passing/failing boards files.
This should better handle the directory, wherever it is.
- Don't save make.log location if make.log is being deleted.
Change-Id: I28e55feef85c9b642ac5ff70ecef113cf7978707
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: https://review.coreboot.org/27596
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>