Unsupported architecture: armv7l: "Asset prebuilt-armv7l.tar.gz not found"

I've noticed that 2 similar issues (on different architectures) were closed recently (#1427 (closed) and #1437 (closed)). I still can't run the gitlab-ci-multi-runner version 1.3.1 on a rpi using hypriotOS.

$ gitlab-ci-multi-runner --version
Version:      1.3.1
Git revision: 4911137
Git branch:   stable-1-3
GO version:   go1.6.2
Built:        Fri, 24 Jun 2016 12:52:41 +0000
OS/Arch:      linux/arm

$ docker --version
Docker version 1.11.1, build 5604cbe

$ docker info | grep Architecture
Architecture: armv7l
WARNING: No cpuset support

$ uname -m
armv7l

It looks like it should have been fixed here: https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/211/diffs#7a056729f6a9c4b323621c1ee3ee2894be489989_148_149 but can't make it work.