macOS: Always pass SDK root when linking with `cc`, and pass it via `SDKROOT` env var#131477

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madsmtm wants to merge 3 commits intorust-lang:masterfrom madsmtm:sdkroot-via-env-var

Commits on Nov 3, 2024

Commits on Nov 10, 2024

Always attempt to get SDK root, and pass it to Clang via env var
madsmtm
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