Add trampoline source

Author: markshannon

Tools/jit/trampoline.c

@@ -0,0 +1,16 @@
+#include "Python.h"
+
+#include "pycore_ceval.h"
+#include "pycore_frame.h"
+#include "pycore_jit.h"
+
+#include "jit.h"
+
+_Py_CODEUNIT *
+_JIT_ENTRY(
+    _PyExecutorObject *exec, _PyInterpreterFrame *frame, _PyStackRef *stack_pointer, PyThreadState *tstate
+) {
+    typedef DECLARE_TARGET((*jit_func));
+    jit_func jitted = (jit_func)exec->jit_code;
+    return jitted(frame, stack_pointer, tstate);
+}