Use LTO to optimize personality function references away in the cdylib

[bjorn3]

This fixes a compilation failure with lld, which is now the default in rustc on x86 linux.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
fuzz-compress_then_decompress	50.41% <ø> (-0.48%)	⬇️
fuzz-decompress_chunked	30.62% <ø> (-2.64%)	⬇️
test-aarch64-apple-darwin	89.32% <ø> (-0.08%)	⬇️
test-aarch64-unknown-linux-gnu	89.32% <ø> (ø)
test-i686-unknown-linux-gnu	89.32% <ø> (ø)
test-x86_64-apple-darwin	89.32% <ø> (ø)
test-x86_64-unknown-linux-gnu	89.40% <ø> (ø)

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see 2 files with indirect coverage changes

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