Include initrd_bootconfig in the list of OTA tools

initrd_bootconfig is required for signing the virt apex & hence needs to
run outside the source tree as well.

Test: NA
Bug: 245277660
Change-Id: Id1776661e76a75cfb3cf530e7777dc4292522dd0
diff --git a/core/Makefile b/core/Makefile
index b5f5b35..211a4ad 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -5027,6 +5027,7 @@
   img2simg \
   img_from_target_files \
   imgdiff \
+  initrd_bootconfig \
   libconscrypt_openjdk_jni \
   lpmake \
   lpunpack \