util/testing: Add ifdtool to tools to be tested

Ensure that the separate Makefile doesn't break.

Change-Id: I0fbe37dc01e46022c5e6de5629eb99f6b86b0b14
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59664
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
diff --git a/util/testing/Makefile.inc b/util/testing/Makefile.inc
index 0b93425..1411c7e 100644
--- a/util/testing/Makefile.inc
+++ b/util/testing/Makefile.inc
@@ -54,6 +54,7 @@
 cbmem \
 ectool \
 futility \
+ifdtool \
 intelmetool \
 inteltool \
 intelvbttool \