Possibility to run cargo from trunk with -Z build-std

[Amareis]

I have app with threading, and to use it in wasm I need target-feature=+simd128,+atomics,+bulk-memory,+mutable-globals
But for this I need to rebuild std, and only for web target. So trunk can make this, if add some cargoflags config entry.

[Amareis]

rust-lang/cargo#8733

For some additional context

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[alecmocatta]

@github-actions[bot] Not stale, still an issue

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions]

This issue was closed because it has been stalled for 5 days with no activity.