New review comment by mtboehlke on void-packages repository

https://github.com/void-linux/void-packages/pull/33143#discussion_r718995285

Comment:
I like the idea of including clang-cpp.  I did some testing with some `#include` and `#ifdef` directives, and made sure the `-I` and `-D` flags work, and as far as I can tell clang-cpp works too.  I have cpp preferred first, since it is probably the expected default, then clang-cpp, and then use mcpp as fallback.