Clang should recognize 'foo-bar' as a typo for 'foo->bar'

|  |  |
| --- | --- |
| Bugzilla Link | [9054](https://llvm.org/bz9054) |
| Version | trunk |
| OS | All |
| CC | @ggreif |

## Extended Description 
This would be gravy.
```c++
struct foo {
  int bar;
};

void test(struct foo *foo) {
  foo-bar = 0;
}
```
Currently this is just an unrecoverable error.