main/zstd causes issues on armhf

Ref https://build.alpinelinux.org/buildlogs/build-edge-armhf/community/borgbackup/borgbackup-1.1.13-r0.log

Last commit https://git.alpinelinux.org/aports/commit/?id=f601214ebf7a2f927f7e8027814a6b6a92ffd3df

Edited Jun 13, 2020 by Andy Postnikov

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information