message: Add DXGI_MAP_* constants
  Found on line 891 of shared/dxgi.h
diff: @@ -146,6 +146,9 @@ interface IDXGIKeyedMutex(IDXGIKeyedMutexVtbl): IDXGIDeviceSubObject(IDXGIDevice
  Key: UINT64,
  ) -> HRESULT,
  });
  +pub const DXGI_MAP_READ: UINT = 1;
  +pub const DXGI_MAP_WRITE: UINT = 2;
  +pub const DXGI_MAP_DISCARD: UINT = 4;
  RIDL!(#[uuid(0xcafcb56c, 0x6ac3, 0x4889, 0xbf, 0x47, 0x9e, 0x23, 0xbb, 0xd2, 0x60, 0xec)]
  interface IDXGISurface(IDXGISurfaceVtbl): IDXGIDeviceSubObject(IDXGIDeviceSubObjectVtbl) {
  fn GetDesc(
  