Make rt_fun_table const, so it goes in .text section.

py/runtime.c

@@ -1546,7 +1546,7 @@ py_obj_t rt_iternext(py_obj_t o_in) {
     }
 }
 
-void *rt_fun_table[RT_F_NUMBER_OF] = {
+const void *const rt_fun_table[RT_F_NUMBER_OF] = {
     rt_load_const_str,
     rt_load_name,
     rt_load_global,

py/runtime.h

@@ -76,7 +76,7 @@ typedef enum {
     RT_F_NUMBER_OF,
 } rt_fun_kind_t;
 
-extern void *rt_fun_table[RT_F_NUMBER_OF];
+extern const void *const rt_fun_table[RT_F_NUMBER_OF];
 
 typedef machine_ptr_t py_obj_t; // must be of pointer size
 typedef py_obj_t (*py_fun_0_t)();