[$] Debian, Rust, and librsvg

Debian supportsmany architectures and, even for those it does not officially support,there are Debian ports that tryto fill in the gap. For most user applications, it is mostly a matter ofgetting GCC up and running for the architecture in question, then buildingall of the different packages that Debian provides. But for packagesthat need to be built with LLVM-applications or libraries that use Rust,for example-that simple recipe becomes more complicated. How much the lackof Rust support for an unofficial architecture should hold back the rest of the distribution was the subject of a somewhatacrimonious discussion recently.