There's a merged pull request on the void-packages repository

wrappers/uname: report correct machine type on ethereal
https://github.com/void-linux/void-packages/pull/18993

Description:
We're using Ethereal chroot style on Travis CI.

In that chroot style, `uname -m` reports x86_64 even if we're
bootstrapped with i686 systems.

Some i686 build that employ `uname -m` is failing on Travis CI,
e.g: https://travis-ci.org/void-linux/void-packages/jobs/648010517#L5787

Change `uname` output to make Travis Output meaningful for i686.