[clang] [clang-repl] Teach the default orc runtime finder to search in more locations (PR #175416)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `clang` at step 12 "build-stage2-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/18036

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure) (timed out)
...
98.533 [6362/9/463] Linking CXX executable unittests/DebugInfo/CodeView/DebugInfoCodeViewTests
98.570 [6362/8/464] Linking CXX executable unittests/Testing/ADT/TestingADTTests
98.581 [6362/7/465] Linking CXX executable unittests/Support/LSP/LLVMSupportLSPTests
98.585 [6362/6/466] Linking CXX executable unittests/Testing/Support/TestingSupportTests
98.598 [6362/5/467] Linking CXX executable unittests/Testing/Annotations/TestingAnnotationTests
98.653 [6362/4/468] Linking CXX executable unittests/Support/DynamicLibrary/DynamicLibraryTests
106.037 [6362/3/469] Building CXX object unittests/FileCheck/CMakeFiles/FileCheckTests.dir/FileCheckTest.cpp.o
106.435 [6361/3/470] Linking CXX executable unittests/FileCheck/FileCheckTests
155.552 [6361/2/471] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangAttrEmitter.cpp.o
177.970 [6360/2/472] Linking CXX executable bin/clang-tblgen
command timed out: 1200 seconds without output running [b'ninja'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1378.853033

```

</details>

https://github.com/llvm/llvm-project/pull/175416