[llvm] [TableGen] Fix source location for anonymous records (PR #110935)

[Matt Arsenault via llvm-commits]

================
@@ -2389,7 +2389,7 @@ Init *VarDefInit::resolveReferences(Resolver &R) const {
   }
 
   if (Changed) {
-    auto New = VarDefInit::get(Class, NewArgs);
+    auto New = VarDefInit::get(Loc, Class, NewArgs);
----------------
arsenm wrote:

```suggestion
    auto *New = VarDefInit::get(Loc, Class, NewArgs);
```

https://github.com/llvm/llvm-project/pull/110935