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

xkeyboard-config: fix upstream issue.
https://github.com/void-linux/void-packages/pull/38998

Description:
use backslashes instead of slashes for line continuation

This fixes 324
(https://gitlab.freedesktop.org/xkeyboard-config/xkeyboard-config/-/issues/324)

<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, x86_64-glibc
- I built this PR locally for these architectures (if supported. mark crossbuilds):

  - armv6l