[clang] [clang] Match MSVC ABI for over-aligned base tail padding on Arm64 (PR #210461)

[Eli Friedman via cfe-commits]

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@@ -363,6 +363,12 @@ latest release, please see the [Clang Web Site](https://clang.llvm.org) or the
 
 #### Windows Support
 
+- Fixed a bug where Clang did not match the MSVC ABI on Arm64 when an
+  over-aligned, non-standard-layout base class is followed by another base
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efriedma-quic wrote:

Is "non-standard-layout" actually relevant here?

https://github.com/llvm/llvm-project/pull/210461