Auto merge of #150357 - ZuseZ4:zusez4-stdarch-push, r=sayantan

stdarch subtree update

Subtree update of `stdarch` to rust-lang/stdarch@6111906.

Created using https://github.com/rust-lang/josh-sync.

r? `@sayantn`

My first josh sync, it lgtm, but let me know if I missed something.
I'm especially looking forward to the amd GPU module, which we want to use for the offload project.

Author: bors