Go's internal/cpu never detects ARM64 features on GOOS=ios, so AES, AES-GCM
and SHA-256 use their generic implementations on iOS and tvOS. Patch the
Go source in the Apple library build to assert the ARMv8.0 cryptographic
extensions, as Go already does for macOS.
See https://github.com/SagerNet/sing-box/issues/4486
