There is an updated pull request by curiousgay against master on the void-packages repository

https://github.com/curiousgay/void-packages tcl
https://github.com/void-linux/void-packages/pull/29094

tcl: make tclConfig.sh executable
This is needed for tcltls which I'm about to package.

A patch file from https://github.com/void-linux/void-packages/pull/29094.patch is attached