[clang] [llvm] Reland "Make sanitizer special case list slash-agnostic" (PR #206250)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-armv8-quick` running on `linaro-clang-armv8-quick` while building `clang,llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/154/builds/33197

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM :: tools/obj2yaml/DXContainer/PRIVPart.yaml' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 5
/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/yaml2obj /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml 2>&1 | /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/obj2yaml 2>&1 | /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/yaml2obj /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml 2>&1 | /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/obj2yaml 2>&1 | /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/FileCheck /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml
# executed command: /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/yaml2obj /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml
# .---command stdout------------
# | DXBC                
   U      (   H   DXIL   `     DXIL
          PRIV   ޭ��B
# `-----------------------------
# executed command: /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/obj2yaml
# .---command stdout------------
# | Error reading file: <stdin>: The file was not recognized as a valid object file
# `-----------------------------
# error: command failed with exit status: 1
# executed command: /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/yaml2obj /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml
# executed command: /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/obj2yaml
# executed command: /home/tcwg-buildbot/worker/clang-armv8-quick/stage1/bin/FileCheck /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/test/tools/obj2yaml/DXContainer/PRIVPart.yaml

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/206250