[clang] [clang][OpenMP] Don't drop debug location when handing off to OMPIRBuilder. (PR #219548)

[LLVM Continuous Integration via cfe-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 `clang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/50900

<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 :: Semantics/OpenACC/acc-default-none-function.f90 (5034 of 5045)
PASS: Flang :: Semantics/OpenACC/acc-default-none-scalars-strict.f90 (5035 of 5045)
PASS: Flang :: Lower/math-lowering/tan.f90 (5036 of 5045)
PASS: Flang :: Lower/math-lowering/tanh.f90 (5037 of 5045)
PASS: Flang :: Driver/use-module-error.f90 (5038 of 5045)
PASS: Flang :: Driver/use-module.f90 (5039 of 5045)
PASS: Flang :: Lower/split-sum-expression-tree-lowering.f90 (5040 of 5045)
PASS: Flang :: Lower/split-sum-expression-tree-subscripts.f90 (5041 of 5045)
PASS: Flang :: Driver/linker-flags.f90 (5042 of 5045)
PASS: Flang :: Driver/linker-options.f90 (5043 of 5045)
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=2095.885358

```

</details>

https://github.com/llvm/llvm-project/pull/219548