rustc_codegen_ssa: emit artifact notifications for the main link product too.
rustc_codegen_ssa: emit artifact notifications for the main link product too.

graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust