Makefile: Add disk image files to TUF repo during cargo make repo

This change adds the disk image files, if they exist, to the targets
that are linked into the TUF repository during the `cargo make repo`
target.  When the image files are in the repo, we can download them with
`tuftool` which can simplify the process of creating AMIs at a different
time or from a different machine.

Makefile.toml

@@ -612,6 +612,14 @@ done
 # modules for a given release.
 LINK_REPO_TARGETS=("--link-target ${BUILDSYS_KMOD_KIT_PATH}")
 
+# Include the root and data disk images in the repo if they exist
+os_disk_img="${BUILDSYS_OUTPUT_DIR}/${BUILDSYS_NAME_FULL}.img.lz4"
+data_disk_img="${BUILDSYS_OUTPUT_DIR}/${BUILDSYS_NAME_FULL}-data.img.lz4"
+if [ -s "${os_disk_img}" ] && [ -s "${data_disk_img}" ]; then
+   LINK_REPO_TARGETS+=("--link-target ${os_disk_img}")
+   LINK_REPO_TARGETS+=("--link-target ${data_disk_img}")
+fi
+
 # Ensure we link an OVA if an OVF template exists (in which case we should have
 # built an OVA)
 if [ -s "${BUILDSYS_OVF_TEMPLATE}" ]; then