util/abuild: Don't pass kconfig output through head

Closing stdout early seems to have a detrimental effect on kconfig on a
system under high load (e.g. when doing lots of builds in parallel).

Change-Id: I6987f1deac596124c7b397bf7bc5a78d691cc538
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44625
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions