upd: improve format script

upd: improve format script

- exec astyle to shave off a fork()
- Align pointers to names. In

      int* a, b;

  only a is a pointer, b isn’t. The alignment to names,

      int *a, b;

  makes this clearer.
- Don’t create backup files – everything’s under version control.
- Don’t format the libraries, there’s no point in that.
- Spell out the recursive option (long form), for readability and
  consistency with the other options (which we also spell out).

Change-Id: Id87beb4351e8b63ae4c492b44f57d38561c2fc85