util/abuild: Set fatal asserts when running scanbuild

Because coreboot's asserts aren't fatal by default, scan-build finds
problems in code that is actually protected by an assert.  This
change fixes that and allows us to add asserts to protect
against other failures.

Change-Id: I9fa605d6309bb40a9cef33b434c9256bf731f457
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/c/31650
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/abuild/abuild

@@ -675,6 +675,7 @@ while true ; do
 			scanbuild=true
 			customizing="${customizing}, scan-build"
 			SCANBUILD_ARGS=${SCANBUILD_ARGS:-'-k'}
+			configoptions="${configoptions}CONFIG_FATAL_ASSERTS=y\n"
 			;;
 		-y|--ccache)    shift
 			customizing="${customizing}, ccache"