Add definition for BQ Prusa i3 Hephestos
Add definition for BQ Prusa i3 Hephestos

Contributes to issue CURA-1278.

Curahelper/Cura,totalretribution/Cura,hmflash/Cura,senttech/Cura,ynotstartups/Wanhao,hmflash/Cura,ynotstartups/Wanhao,senttech/Cura,Curahelper/Cura,fieldOfView/Cura,totalretribution/Cura,fieldOfView/Cura