Revert "Update toolbox base debian image to buster."

This reverts commit d705598525a9dbec58dc82a2b25af0223ac4ec2d.

Reason for revert: Presubmit failed. Create a revert to see whether this is culprit.

Change-Id: I81cc4657e4b62fa47d105ea2ab11cccabdd395ed
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/8421
Reviewed-by: Saied Kazemi <saied@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/app-admin/toolbox/files/etc.default.toolbox b/project-lakitu/app-admin/toolbox/files/etc.default.toolbox
index aef27df..d9fab8b 100644
--- a/project-lakitu/app-admin/toolbox/files/etc.default.toolbox
+++ b/project-lakitu/app-admin/toolbox/files/etc.default.toolbox
@@ -3,6 +3,6 @@
 # found in the LICENSE file.
 
 TOOLBOX_DOCKER_IMAGE="gcr.io/google-containers/toolbox"
-TOOLBOX_DOCKER_TAG="20201104-00"
+TOOLBOX_DOCKER_TAG="20200715-00"
 TOOLBOX_BIND="--bind=/:/media/root/ --bind=/mnt/disks/:/media/root/mnt/disks/ --bind=/var/:/media/root/var/ --bind=/home:/media/root/home/ --bind=/etc/resolv.conf:/etc/resolv.conf"
 : ${USER:=root}
diff --git a/project-lakitu/app-admin/toolbox/toolbox-0.0.1-r24.ebuild b/project-lakitu/app-admin/toolbox/toolbox-0.0.1-r23.ebuild
similarity index 100%
rename from project-lakitu/app-admin/toolbox/toolbox-0.0.1-r24.ebuild
rename to project-lakitu/app-admin/toolbox/toolbox-0.0.1-r23.ebuild