missing native/rust-qoriq dependency for qoriq

[hgy59]

After make native-clean the native/rust-qoriq dependency is not built when building rust dependent packages for qoriq.

This is related to the installation of rust in the development environment. The installation of rust must not be coupled to the installation of the toolchains.
This seems to be an issue too, when a package requires a dedicated version of rust (nightly or a specific version instead of stable)

see #6002 (comment)

[th0ma7]

some randomd thoughts... why not moving it under toolchain/syno-qoriq-6-2.4-rust ... as this is a toolchain, no? Further that may allow to later do a toolchain/syno-qoriq-6.2.4-llvm (something else I got pending with missng cycles).

[th0ma7]

Looking at what is being cached (considering there lie the issue), there are toolchain and distrib (from `.github/workflows/build.yml). Native does not seems to be cached.

Further thinking this through question is, considering toolchain got cached, would this entail that the toolchain skips its dependencies? Looking at toolchain/syno-qoriq-6.2.4/work/.depend_done cookie, absolutely - this results in the skiping of the native/rust-qoriq.

Although looking at my precedent post #6054 (comment), using toolchain/syno-qoriq-6-2.4-rust solves that as both toolchain and distrib are cached.

@hgy59 I'll create a PR with this in mind to have your thoughts on.