util/abuild: Fix update_config function

- Because $configoptions contains embedded newlines that we want to be
interpreted when we pipe it out to the config file, change that back to
a printf, and tell shellcheck that we want to do it.
- 'make olddefconfig' & 'yes "" | make oldconfig' give us the same
output for the config file, but olddefconfig doesn't generate the log
the way oldconfig does.  Go back to the previous behavior.
- Don't overwrite the config log with make savedefconfig.

Change-Id: I4966a3bb2541b452eeb4ca73ac3cd727f8525636
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17853
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

0 files changed, 0 insertions, 0 deletions