cc3200: Enable base64 methods from modubinascii.

cc3200/mods/modubinascii.c

@@ -51,6 +51,8 @@ STATIC const mp_map_elem_t mp_module_binascii_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR___name__),        MP_OBJ_NEW_QSTR(MP_QSTR_ubinascii) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_hexlify),         (mp_obj_t)&mod_binascii_hexlify_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_unhexlify),       (mp_obj_t)&mod_binascii_unhexlify_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_a2b_base64),      (mp_obj_t)&mod_binascii_a2b_base64_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_b2a_base64),      (mp_obj_t)&mod_binascii_b2a_base64_obj },
 };
 
 STATIC MP_DEFINE_CONST_DICT(mp_module_binascii_globals, mp_module_binascii_globals_table);

cc3200/qstrdefsport.h

@@ -386,3 +386,6 @@ Q(sha256)
 Q(ubinascii)
 Q(hexlify)
 Q(unhexlify)
+Q(a2b_base64)
+Q(b2a_base64)
+