uucore: fix time64 build of the process timer

[sylvestre]

No description provided.

[Copilot]

🟡 Changes recommended

Add regression coverage for Timer::arm/wait_or_timeout on an affected time64 target.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

This pull request fixes Unix process-timer initialization for time64 targets.

Changes:

• Default-initialize timespec values.
• Populate timer expiration fields afterward.

File summaries

File	Summary
src/uucore/src/lib/features/process/unix.rs	Updates timer construction for time64 compatibility; regression coverage is still requested.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[codspeed-hq]

Merging this PR will improve performance by 18.85%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
✅ 366 untouched benchmarks
⏩ 50 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	true_consecutive_calls	350.2 ns	294.7 ns	+18.85%

Tip

Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing sylvestre:time (df3e017) with main (f604ab9)²}

Footnotes

1. 50 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (51ed5dc) during the generation of this report, so f604ab9 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/cut/bounded-memory (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/tail/pipe-f is now being skipped but was previously passing.
Congrats! The gnu test tests/tail/tail-n0f is now passing!