## Why
The latest `openssl-src` 300.x crate still bundles OpenSSL 3.6.3. Build the 3.6.4 security release directly while preserving the existing 3.x ABI.
## What changed
- Build static OpenSSL libraries with the musl compiler for `x86_64` and `aarch64`, verifying the source archive's SHA-256 checksum.
- Set target-specific OpenSSL overrides to bypass vendored builds without affecting host build dependencies.
- Add `perl` and `make` to the musl build prerequisites and reuse completed OpenSSL installations.
GitOrigin-RevId: 4276c7d6cf30c31c8554246cea2f406dfbf7568b