New review comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/30702#discussion_r627310750

Comment:
base-chroot only depends on bootstrap packages and sccache is not one, and will not be one, as that'd impose rust toolchain dependency for bootstrap and we!re not doing that

besides, sccache is limited to a small fraction of CPU architectures, which is another reason even if rust was bootstrap