add dim3 and grid_group

Author: isVoid

numba_cuda/numba/cuda/types/__init__.py

@@ -14,7 +14,7 @@
 from .npytypes import *
 from .scalars import *
 from .function_type import *
-from .ext_types import bfloat16
+from .ext_types import bfloat16, dim3, grid_group
 
 numpy_version = tuple(map(int, np.__version__.split(".")[:2]))
 
@@ -220,6 +220,8 @@
     ffi
     deferred_type
     bfloat16
+    dim3
+    grid_group
 """