Switch hexagon targets to rust-lld

[androm3da]

lld is a great choice for a default linker.

[rustbot]

These commits modify compiler targets.
(See the Target Tier Policy.)

Some changes occurred in src/doc/rustc/src/platform-support

cc @Noratrieb

[rustbot]

r? @JonathanBrouwer

rustbot has assigned @JonathanBrouwer.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

[JonathanBrouwer]

r? compiler
Looks good to me but this is not an area of the compiler I've touched before so don't feel comfortable approving

[hkBst]

@JonathanBrouwer me neither, but IIUC you can run a CI test on the affected arch with a try-run?

[Noratrieb]

We don't run Hexagon tests. I have no concerns here, and as a tier 3 target, we usually defer these things to the target maintainers, which the author is for Hexagon.

@bors r=JonathanBrouwer,Noratrieb rollup

[bors]

📌 Commit 5ed01e9 has been approved by JonathanBrouwer,Noratrieb

It is now in the queue for this repository.