Improve some TBAA label names, particular for memory.

Memory can't change between static and dynamic, so use that in the TBAA label
name.

Distinguish between local and imported memory, table and globals.

lib/llvm-backend/src/code.rs

@@ -577,16 +577,16 @@ fn resolve_memory_ptr(
             tbaa_label(
                 module.clone(),
                 intrinsics,
-                "context_field_ptr_to_base",
+                "dynamic_memory_base",
                 base.as_instruction_value().unwrap(),
-                None,
+                Some(0),
             );
             tbaa_label(
                 module.clone(),
                 intrinsics,
-                "context_field_ptr_to_bounds",
+                "dynamic_memory_bounds",
                 bounds.as_instruction_value().unwrap(),
-                None,
+                Some(0),
             );
             (base, bounds)
         }