Update stdarch submodule

[GuillaumeGomez]

I'm syncing the rustc_codegen_gcc backend currently and it seems that the new rustc version we use is not happy with the current stdarch submodule version: https://github.com/rust-lang/rustc_codegen_gcc/actions/runs/7930753019/job/21653642490?pr=439

r? @Amanieu

[rustbot]

⚠️ Warning ⚠️

• These commits modify submodules.

[Amanieu]

I just merged some PRs, can you update the submodule to the latest master?

[GuillaumeGomez]

Sure, done!

[Amanieu]

There's been a few more updates on stdarch, can you update again?

[GuillaumeGomez]

Done!

[Amanieu]

@bors r+

[bors]

📌 Commit 9f3f2cd has been approved by Amanieu

It is now in the queue for this repository.

[RalfJung]

@bors p=1
(submodule / tool update, unblocking other work)

[bors]

⌛ Testing commit 9f3f2cd with merge 3246e79...

[bors]

☀️ Test successful - checks-actions
Approved by: Amanieu
Pushing 3246e79 to master...

[rust-timer]

Finished benchmarking commit (3246e79): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.3%	[-0.3%, -0.3%]	1
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	2.8%	[2.8%, 2.8%]	1
Regressions ❌ (secondary)	3.4%	[2.3%, 4.8%]	5
Improvements ✅ (primary)	-3.3%	[-3.3%, -3.3%]	1
Improvements ✅ (secondary)	-2.6%	[-3.9%, -1.2%]	2
All ❌✅ (primary)	-0.2%	[-3.3%, 2.8%]	2

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 640.03s -> 639.676s (-0.06%)
Artifact size: 308.82 MiB -> 308.81 MiB (-0.00%)