4111: Record definitions in `extern` blocks r=jonas-schievink a=jonas-schievink
Enables completion of extern functions and statics.
Closes https://github.com/rust-analyzer/rust-analyzer/issues/3711
4112: Add Launch configuration for release build r=matklad a=jonas-schievink
The debug build takes very long until I can test anything useful, with the release build it's much quicker. Add another Run configuration for it.
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>