all: Format code to add space after C++-style comment start.

Note: the uncrustify configuration is explicitly set to 'add' instead of
'force' in order not to alter the comments which use extra spaces after //
as a means of indenting text for clarity.

extmod/moducryptolib.c

@@ -375,4 +375,4 @@ const mp_obj_module_t mp_module_ucryptolib = {
     .globals = (mp_obj_dict_t *)&mp_module_ucryptolib_globals,
 };
 
-#endif //MICROPY_PY_UCRYPTOLIB
+#endif // MICROPY_PY_UCRYPTOLIB