New comment by edneville on void-packages repository

https://github.com/void-linux/void-packages/pull/31430#issuecomment-860108885

Comment:
> +_binary=please

> +pre_build() {
> +	export CC_${RUST_BUILD//-/_}="${BUILD_CC}"
> +}

> +post_install() {
> +	local manpage

@abenson, I've updated the template, thanks for looking again