Clang-Format: Allow empty functions to be single-line

For example

```
OIIOOutputDriver::~OIIOOutputDriver()
{
}
```

becomes

```
OIIOOutputDriver::~OIIOOutputDriver() {}
```

Saves quite some vertical space, which is especially handy for
constructors.

Pull Request: blender/blender#105594

source/blender/python/intern/stubs.c

@@ -25,13 +25,9 @@ void BPY_pyconstraint_exec(struct bPythonConstraint *con,
                            struct ListBase *targets)
 {
 }
-void BPY_pyconstraint_target(struct bPythonConstraint *con, struct bConstraintTarget *ct)
-{
-}
+void BPY_pyconstraint_target(struct bPythonConstraint *con, struct bConstraintTarget *ct) {}
 bool BPY_is_pyconstraint(struct Text *text)
 {
   return 0;
 }
-void BPY_pyconstraint_update(struct Object *owner, struct bConstraint *con)
-{
-}
+void BPY_pyconstraint_update(struct Object *owner, struct bConstraint *con) {}