Merge pull request #2050 from dkolsen-pgi/bug/missing-iostream

Include iostream in launch.cu

Author: ericniebler

examples/nvexec/launch.cu

@@ -19,6 +19,7 @@
 #include <stdexec/execution.hpp>
 
 #include <cub/cub.cuh>
+#include <iostream>
 #include <numeric>
 
 #include <thrust/device_vector.h>