Electron Releases

Description of Change

Linux ARM64 cross-builds fail while rebuilding the object-wrap test addon: the linker reports that the target libc++ archives are incompatible with elf64-x86-64.

The addon toolchain introduced in #53390 selects Chromium clang and the target build's libc++ libraries but supplies no cross-compilation target or sysroot. npm_config_arch=arm64 configures node-gyp, not clang, so the compiler and linker still default to x64 on an x64 worker.

Pass the requested target triple and Electron sysroot to C/C++ compilation and linking, preserving caller flags and reporting missing cross sysroots explicitly.

Related to #53390.

CC @deepak1556 @MarshallOfSound as reviewers/stakeholders of 53390.
CC @mlaurencin as downstream stakeholder

Validation

• Focused Node checks against the actual helper cover the original missing-target behavior, four cross targets, caller flags, native equivalence without overrides, environment-variable casing, compiler fallbacks, optional libc++abi, and missing-sysroot errors.
• Chromium clang -### confirms target and sysroot forwarding for ARM64, ARM, ia32, and x64 compilation and linking. This is print-only validation, not a successful cross-build.
• Scoped JavaScript lint, formatting, whitespace checks, and pre-commit hooks pass.
• The affected helper is identical on current 42-x-y, 43-x-y, 44-x-y, and 45-x-y; the patch applies cleanly to all four, matching #53390's backport coverage.
• Full ARM64 compile/link and runtime tests were not run: the local checkout lacks the ARM64 sysroot and target build artifacts.

Checklist

• I have built and tested this change
• I have filled out the PR description
• I have reviewed and verified the changes
• npm test passes

Release Notes

Notes: none