GPU target notification group

Github Label: None
Ping command: @rustbot ping gpu-target

This notification group deals with linker related issues and their integration within the compiler.

The group also has an associated Zulip stream (#t-compiler/linker) where people can go to ask questions and discuss GPU-related topics and issues.

if you’re interested in participating, feel free to sign up for this group! To do so, open a PR against the rust-lang/team repository and add your GitHub user to this file.