[lldb] Handle DeclKind::MacroExpansion (#5546)

See swiftlang/swift#61662 and swiftlang/swift#61845.

Author: kastiglione

lldb/source/Plugins/TypeSystem/Swift/SwiftASTContext.cpp

@@ -4140,6 +4140,7 @@ static SwiftASTContext::TypeOrDecl DeclToTypeOrDecl(swift::ASTContext *ast,
     case swift::DeclKind::Param:
     case swift::DeclKind::Module:
     case swift::DeclKind::MissingMember:
+    case swift::DeclKind::MacroExpansion:
       break;
 
     case swift::DeclKind::InfixOperator:
@@ -7944,6 +7945,9 @@ static void DescribeFileUnit(Stream &s, swift::FileUnit *file_unit) {
       case swift::SourceFileKind::Interface:
         s.PutCString("Interface");
         break;
+      case swift::SourceFileKind::MacroExpansion:
+        s.PutCString("MacroExpansion");
+        break;
       }
     }
   } break;