New review comment by Logarithmus on void-packages repository

https://github.com/void-linux/void-packages/pull/31706#discussion_r662310600

Comment:
@ericonr hmm we still have gcc 10.2 in Void, and it's older than clang 12, and that's why our gcc doesn't support c++20. When our gcc will be updated, we will ditch this line.