Fix load type not initialized issue for LLVMBuildLoad2 (#1381)

Fix the issue introduced by #1202, clear the compilation warning
when building wamrc based on LLVM 14/15.

core/iwasm/compilation/aot_llvm.c

@@ -2735,11 +2735,13 @@ aot_load_const_from_table(AOTCompContext *comp_ctx, LLVMValueRef base,
             /* Store the raw int bits of i32 const as a hex string */
             snprintf(buf, sizeof(buf), "i32#%08" PRIX32, value->i32);
             const_ptr_type = INT32_PTR_TYPE;
+            const_type = I32_TYPE;
             break;
         case VALUE_TYPE_I64:
             /* Store the raw int bits of i64 const as a hex string */
             snprintf(buf, sizeof(buf), "i64#%016" PRIX64, value->i64);
             const_ptr_type = INT64_PTR_TYPE;
+            const_type = I64_TYPE;
             break;
         case VALUE_TYPE_F32:
             /* Store the raw int bits of f32 const as a hex string */