Update LLVM submodule to 17.0.0-rc4

[djkoloski]

Updates the in-tree LLVM submodule to the 17.0.0-rc4 branch from rust-lang/llvm-project#151.

[rustbot]

r? @cuviper

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[rustbot]

⚠️ Warning ⚠️

• These commits modify submodules.

[cuviper]

Thanks!

@bors r+ rollup=never

[bors]

📌 Commit fba61a8 has been approved by cuviper

It is now in the queue for this repository.

[bors]

⌛ Testing commit fba61a8 with merge ff902ff...

[bors]

☀️ Test successful - checks-actions
Approved by: cuviper
Pushing ff902ff to master...

[rust-timer]

Finished benchmarking commit (ff902ff): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

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)	-	-	0
Regressions ❌ (secondary)	1.6%	[1.6%, 1.6%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

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: 628.337s -> 628.364s (0.00%)
Artifact size: 316.11 MiB -> 316.22 MiB (0.03%)

[wesleywiser]

Nominating for beta backport to resolve the regression-from-stable-to-beta in #115385

[wesleywiser]

This was done via #115959 which has been accepted for beta backport.