configs: Add build test configs for CBFS verification

Now that CBFS verification is available as an optional feature in
menuconfig (CB:59982), we should add build test configs to ensure it
doesn't break without notice. One Arm and one x86 board should be good
enough for now.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I530dfd37472e63b80a67badd22a13d54d2c4621b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60467
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
diff --git a/configs/config.google_volteer.build_test_purposes b/configs/config.google_volteer.build_test_purposes
index 8531b79..6843aeb 100644
--- a/configs/config.google_volteer.build_test_purposes
+++ b/configs/config.google_volteer.build_test_purposes
@@ -30,3 +30,4 @@
 CONFIG_DEBUG_CONSOLE_INIT=y
 CONFIG_DEBUG_SPI_FLASH=y
 CONFIG_DEBUG_BOOT_STATE=y
+CONFIG_CBFS_VERIFICATION=y