The `type<n>` cannot be hinted properly in IDEs.

The `type` cannot be hinted properly in IDEs.

e.g
```
import pyopencl as cl
import pyopencl.cltypes

N = 10
HOST_myArray = np.array([cl.cltypes.make_float4(1, 0, 0, 0)] * N, dtype=cl.cltypes.float4)
```
The `make_float4` function and `float4` types are not recognized. They are executed, but I think since they are not explicitly declared in `cltypes.py`, the ides have a hard time understanding