[compiler-rt] Fix extendhfxf2 test (PR #117665)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

This change does fix tests on x86_64 mingw, but it still fails on i686 mingw, and it also breaks a number of previously working tests there - have a look: https://github.com/mstorsjo/llvm-project/actions/runs/12026429539/job/33525399943

You can try this out for yourself - cherrypick https://github.com/mstorsjo/llvm-project/commit/gha-mingw-compiler-rt onto your branch and push to your fork, and it will run these tests in your own github fork (no PR needed even).


https://github.com/llvm/llvm-project/pull/117665