Accept both patched (pre-4.5) and post-4.5 Rust packages
This PR makes the build system accept and install both the patched Rust packages, as well as the updated stock Rust packages released with SFOS SDK 3.104 (target 4.5.0.18) -- 1.52.1+git4-1.9.1.jolla
>= 1.52.1+git3-1