Update toolbox tag to 20200715-00

The new version of cos-toolbox container includes cos-kernel support for
5.4, and also reduce ~160M by merging two RUN commands.

BUG=b:160837915
TEST=Tryjob/sponge2/4faf6130-4a80-4fb4-aa91-3ad4a8878021
RELEASE_NOTE=Updated toolbox tag to 20200715-00.

Change-Id: I4905a9458b199f817bc9ba493a5d1455dee5aa5d
diff --git a/overlay-lakitu/app-admin/toolbox/files/etc.default.toolbox b/overlay-lakitu/app-admin/toolbox/files/etc.default.toolbox
index b822cbf..d9fab8b 100644
--- a/overlay-lakitu/app-admin/toolbox/files/etc.default.toolbox
+++ b/overlay-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="20200603-00"
+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/overlay-lakitu/app-admin/toolbox/toolbox-0.0.1-r22.ebuild b/overlay-lakitu/app-admin/toolbox/toolbox-0.0.1-r23.ebuild
similarity index 100%
rename from overlay-lakitu/app-admin/toolbox/toolbox-0.0.1-r22.ebuild
rename to overlay-lakitu/app-admin/toolbox/toolbox-0.0.1-r23.ebuild