modified hecbench.cmake and add hecbench cases
modified hecbench.cmake and iso2dfd-hip case. add lavamd-hip lavamd-hip loopback-hip particle-diffusion-hip pns-hip cases
modified hecbench.cmake and iso2dfd-hip case. add lavamd-hip lavamd-hip loopback-hip particle-diffusion-hip pns-hip cases