Run core tests in Safari. Partially addresses https://github.com/pyodide/pyodide/issues/989

It runs, but there are several test failures, I'll open separate issues about those.
#include "include/sharedlibtest.h"

int
do_the_thing(int a, int b)
{
  return dep_do_the_thing(a, b) + b + a * b;
}

#include "include/sharedlibtest.h"

int
do_the_thing(int a, int b)
{
  return dep_do_the_thing(a, b) + b + a * b;
}
