Fix other.test_split_module_wasm64 test. NFC

This should have been part of #25432 but I guess I landed it too
eagerly.

Author: sbc100

test/other/test_split_module.post.js

@@ -1,9 +1,11 @@
+#preprocess
+
 function saveProfileData() {
   var __write_profile = wasmExports['__write_profile'];
   if (__write_profile) {
-    var len = __write_profile(0, 0);
+    var len = __write_profile({{{ to64('0') }}}, 0);
     var offset = _malloc(len);
-    var actualLen = __write_profile(offset, len);
+    var actualLen = __write_profile({{{ to64('offset') }}}, len);
     var profile_data = HEAPU8.subarray(offset, offset + len);
     if (typeof writeFile !== 'undefined') {
       console.log('using writeFile')