py/nativeglue: Make mp_fun_table fixed size regardless of config.

So that mpy files with native code will always work correctly, and raise an
exception if a feature is used that is not supported by the runtime.

py/runtime0.h

@@ -173,10 +173,8 @@ typedef enum {
     MP_F_BUILD_TUPLE,
     MP_F_BUILD_LIST,
     MP_F_BUILD_MAP,
-#if MICROPY_PY_BUILTINS_SET
     MP_F_BUILD_SET,
     MP_F_STORE_SET,
-#endif
     MP_F_LIST_APPEND,
     MP_F_STORE_MAP,
     MP_F_MAKE_FUNCTION_FROM_RAW_CODE,
@@ -191,9 +189,7 @@ typedef enum {
     MP_F_IMPORT_NAME,
     MP_F_IMPORT_FROM,
     MP_F_IMPORT_ALL,
-#if MICROPY_PY_BUILTINS_SLICE
     MP_F_NEW_SLICE,
-#endif
     MP_F_UNPACK_SEQUENCE,
     MP_F_UNPACK_EX,
     MP_F_DELETE_NAME,