Ensure nested allocations in statics do not get deduplicated

compiler/rustc_hir/src/def.rs

@@ -250,6 +250,9 @@ impl DefKind {
             | DefKind::AssocTy
             | DefKind::TyParam
             | DefKind::ExternCrate => DefPathData::TypeNs(name),
+            // It's not exactly an anon const, but wrt DefPathData, there
+            // is not difference.
+            DefKind::Static { nested: true, .. } => DefPathData::AnonConst,
             DefKind::Fn
             | DefKind::Const
             | DefKind::ConstParam