[llvm] [dsymutil] Add missing validation for zero alignment section (PR #168925)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx-nvidia-win` running on `as-builder-8` while building `llvm` at step 7 "test-build-unified-tree-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/54/builds/14905

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

```
Step 7 (test-build-unified-tree-check-llvm) failure: test (failure)
******************** TEST 'LLVM-Unit :: Support/./SupportTests.exe/79/105' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:C:\buildbot\as-builder-8\llvm-nvptx-nvidia-win\build\unittests\Support\.\SupportTests.exe-LLVM-Unit-17644-79-105.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=105 GTEST_SHARD_INDEX=79 C:\buildbot\as-builder-8\llvm-nvptx-nvidia-win\build\unittests\Support\.\SupportTests.exe
--


Note: This is test shard 80 of 105.

[==========] Running 16 tests from 16 test suites.

[----------] Global test environment set-up.

[----------] 1 test from BinaryStreamTest

[ RUN      ] BinaryStreamTest.DropOperations

[       OK ] BinaryStreamTest.DropOperations (0 ms)

[----------] 1 test from BinaryStreamTest (0 ms total)



[----------] 1 test from CommandLineTest

[ RUN      ] CommandLineTest.TokenizeAndMarkEOLs

[       OK ] CommandLineTest.TokenizeAndMarkEOLs (0 ms)

[----------] 1 test from CommandLineTest (0 ms total)



[----------] 1 test from DataExtractorTest

[ RUN      ] DataExtractorTest.LEB128_error

[       OK ] DataExtractorTest.LEB128_error (0 ms)

[----------] 1 test from DataExtractorTest (0 ms total)



[----------] 1 test from Error

[ RUN      ] Error.ForwardToExpected

[       OK ] Error.ForwardToExpected (0 ms)

[----------] 1 test from Error (0 ms total)
...

```

</details>

https://github.com/llvm/llvm-project/pull/168925