[3.15] gh-156243: Indicate that emscripten_runtime depends on stringToNewUTF8 (GH-156335) (#156383)

Co-authored-by: Hood Chatham <roberthoodchatham@gmail.com>

Author: miss-islington

Python/sysmodule.c

@@ -3898,6 +3898,8 @@ static PyStructSequence_Desc emscripten_info_desc = {
     4
 };
 
+EM_JS_DEPS(_Py_emscripten_runtime, "$stringToNewUTF8")
+
 EM_JS(char *, _Py_emscripten_runtime, (void), {
     var info;
     if (typeof process === "object") {