clang-format regression on attribute macros

command: `clang-format -style='{PointerAlignment: Left, AttributeMacros: [my_fancy_attribute_macro]}' a.cc`

expected:
```cpp
SomeLongTypeName* my_fancy_attribute_macro const
    some_name;  // Long comment about some_name.
```

actual:
```cpp
SomeLongTypeName*
    my_fancy_attribute_macro const some_name; // Long comment about some_name.
```