[flang-commits] [flang] [flang] Add #include to fix MSVC build (PR #161415)

[LLVM Continuous Integration via flang-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `flang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/40883

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-flang) failure: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
...
PASS: Flang :: Lower/derived-types.f90 (3845 of 3855)
PASS: Flang :: Lower/math-lowering/floor.f90 (3846 of 3855)
PASS: Flang :: Lower/math-lowering/nint.f90 (3847 of 3855)
PASS: Flang :: Lower/module_definition.f90 (3848 of 3855)
PASS: Flang :: Lower/dummy-argument-optional.f90 (3849 of 3855)
PASS: Flang :: Lower/program-units-fir-mangling.f90 (3850 of 3855)
PASS: Flang :: Lower/submodule.f90 (3851 of 3855)
PASS: Flang :: Lower/module-generic-with-specific-mangling.f90 (3852 of 3855)
PASS: Flang :: Lower/math-lowering/tan.f90 (3853 of 3855)
PASS: Flang :: Intrinsics/math-codegen.fir (3854 of 3855)
command timed out: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=4176.537598

```

</details>

https://github.com/llvm/llvm-project/pull/161415