[clang] fix emiision of nested unused enum types with -fno-eliminate-unused-d… (PR #137818)

[Steve Merritt via cfe-commits]

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@@ -1987,7 +1987,8 @@ void CGDebugInfo::CollectRecordFields(
 
         // Bump field number for next field.
         ++fieldNo;
-      } else if (CGM.getCodeGenOpts().EmitCodeView) {
+      } else if (CGM.getCodeGenOpts().hasMaybeUnusedDebugInfo() ||
+                 CGM.getCodeGenOpts().EmitCodeView) {
         // Debug info for nested types is included in the member list only for
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stevemerr wrote:

Should update the comment as well.

https://github.com/llvm/llvm-project/pull/137818