[llvm] [dsymutil] Fix parallel linker's self-recursive typedef DIE by including referred-to types into synthetic name (PR #166767)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-win` running on `sie-win-worker` while building `llvm` at step 4 "clean-build-dir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/46/builds/26015

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

```
Step 4 (clean-build-dir) failure: Delete failed. (failure)
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: tools/dsymutil/typedefs-with-same-name.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
z:\b\llvm-clang-x86_64-sie-win\build\bin\dsymutil.exe --linker=parallel -f -oso-prepend-path=Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\tools\dsymutil/Inputs/ -y Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\tools\dsymutil\typedefs-with-same-name.test -o Z:\b\llvm-clang-x86_64-sie-win\build\test\tools\dsymutil\Output\typedefs-with-same-name.test.tmp.dwarf
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\dsymutil.exe' --linker=parallel -f '-oso-prepend-path=Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\tools\dsymutil/Inputs/' -y 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\tools\dsymutil\typedefs-with-same-name.test' -o 'Z:\b\llvm-clang-x86_64-sie-win\build\test\tools\dsymutil\Output\typedefs-with-same-name.test.tmp.dwarf'
# .---command stderr------------
# | error: unable to get target for 'arm64-apple-darwin', see --version and --triple.
# | note: while processing dwarf streamer init
# | error: Z:\b\llvm-clang-x86_64-sie-win\build\test\tools\dsymutil\Output\typedefs-with-same-name.test.tmp.dwarf: The file was not recognized as a valid object file
# `-----------------------------
# error: command failed with exit status: 1

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/166767