Prefer to use `path` instead of `filepath` which is platform specific
Tries to fix #997 (closed)
Test builds:
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-linux-386
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-linux-amd64
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-linux-arm
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-darwin-386
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-darwin-amd64
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-windows-386.exe
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-windows-amd64.exe
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-freebsd-386
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-freebsd-amd64
https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/use-filepath/binaries/gitlab-ci-multi-runner-freebsd-arm