meson: Do not compile with -DSTANDALONE

This enables the -o option which is used to collect logs for debugging.

Change-Id: If6c12c682ba72cd519e30f1f8c96552322ff75e3
Signed-off-by: Richard Hughes <richard@hughsie.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/42230
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71739
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed