/usr/include/viennacl/scheduler/ is in libviennacl-dev 1.5.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/viennacl/scheduler/execute.hpp
/usr/include/viennacl/scheduler/execute_axbx.hpp
/usr/include/viennacl/scheduler/execute_elementwise.hpp
/usr/include/viennacl/scheduler/execute_generic_dispatcher.hpp
/usr/include/viennacl/scheduler/execute_matrix_dispatcher.hpp
/usr/include/viennacl/scheduler/execute_matrix_prod.hpp
/usr/include/viennacl/scheduler/execute_scalar_assign.hpp
/usr/include/viennacl/scheduler/execute_scalar_dispatcher.hpp
/usr/include/viennacl/scheduler/execute_util.hpp
/usr/include/viennacl/scheduler/execute_vector_dispatcher.hpp
/usr/include/viennacl/scheduler/forwards.h
/usr/include/viennacl/scheduler/io.hpp