[llvm] Reland "[ObjectYAML][ELF] Take alignment into account when generating notes" (PR #118434)

[James Henderson via llvm-commits]

================
@@ -462,3 +466,32 @@ Sections:
         Desc: 030405
       - Name: GNU
         Type: NT_GNU_BUILD_ID
+
+--- !ELF
----------------
jh7370 wrote:

I think you can avoid this almost duplicate YAML blob by using yaml2obj's -D option e.g.
```
yaml2obj -DELFCLASS=32 ...
....

Class: ELFCLASS[[ELFCLASS]]
```

https://github.com/llvm/llvm-project/pull/118434