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

[B I Mohammed Abbas via llvm-commits]

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@@ -55,11 +54,16 @@ int main() {
                        (long double)-__builtin_huge_valf64x()))
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biabbas wrote:

ok.

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