Second failure, and a self-inflicted one: `gst-plugin-rsrtp` is not a package
in gst-plugins-rs at 0.15.3 — or at 0.14.5. The crate is `gst-plugin-rtp`,
whose lib is named `gstrsrtp`, so the plugin filename and the package name
differ.
I took `gst-plugin-rsrtp` from reachy-mini-desktop-app README, which documents
a cargo cinstall line that cannot have worked at either tag. Read the crate
Cargo.toml, not a README — the source was one API call away.
The rockchip plugin and gst-plugin-webrtc both built fine, so the pin move in
the previous commit was right; this was the next thing along.
Also validates every crate name with `cargo pkgid` before compiling any of
them. cargo cinstall only checks a package name when it reaches it, so a typo
in the second crate surfaces after the first has spent three minutes building.
Now it costs a second.
Assisted-by: Claude:claude-opus-5[1m] shellcheck
f1915a218a