Bump portable-atomic from 1.14.0 to 1.15.0 in /src/_bcrypt

[dependabot]

Bumps portable-atomic from 1.14.0 to 1.15.0.

Changelog

Sourced from portable-atomic's changelog.

[1.15.0] - 2026-08-09

• Work around core::sync::atomic bug which may cause data races with non-relaxed load/CAS on pre-v6 ARM Linux/Android due to missing memory barrier. (#112)

• Make {8,16,32}-bit non-relaxed load compatible with read-only memory on pre-v6 ARM Linux/Android. Previously only relaxed load was compatible with read-only memory. (#112)

• Make from_ptr const fn on Rust 1.58+. Previously it was const fn only on Rust 1.83+. (c09d0e6)

• Optimize non-relaxed load/store on pre-v6 ARM Linux/Android. (#112)

• Optimize fence on pre-v6 ARM Linux/Android. (#112)

• Optimize 128-bit CAS/swap/min/max on s390x. This also includes removing the code complexity that caused the bug fixed in 1.14.0. (33cd7e5, 6c8f764)

• Documentation improvements.

Commits

• e459552 Release 1.15.0
• cb58081 Update changelog
• c5b8b98 arm_linux: Remove useless cache
• b97efba ci: Re-enable detect_false test on Android
• eaee7ec detect: Update comments
• c6fab54 tests: AArch64 L4Re is now available as builtin target
• d0832a1 tsan: Enable Adaptive Delay
• 81c2ee5 ci: Clean up sanitizer job
• cfb767d Optimize non-relaxed load/store/fence and work around compiler-builtins bug o...
• f19289e ci: Use full-length rev for mgba-test-runner
• Additional commits viewable in compare view

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