Cross-compiling from Windows to macOS with `-fstrip` results in a compiler hang with 0.15.2

[alexrp]

This appears to be a regression from 0.15.1 to 0.15.2:

$ touch empty.zig
$ zig.exe build-lib -target aarch64-macos-none -fstrip empty.zig

#25529 looks potentially related?

We might need to roll a 0.15.3 for this - it's a pretty impactful bug IMO.

[squeek502]

From what @mlugg has said on Zulip, seems to be a combination of:

• Some part of the compiler is leaking a file handle
• This check is somehow misbehaving so FILE_DISPOSITION_POSIX_SEMANTICS is not being used
• fs.Dir.deleteTree has no upper bound on retries #15465