added Get_Pressure_from_DE to HLLC_cuda
added Get_Pressure_from_DE to HLLC_cuda

cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,evaneschneider/cholla,evaneschneider/cholla