add cranelift to the Rust section

[ofrobots]

Please fill in this template:

• Use a meaningful title for the pull request. Include the name of the resource added.
• Add a short sentence on why do you think the resource you're adding is awesome!
  Cranelift is a general purpose code generator written in Rust. It is also forms the foundation of the WebAssembly JIT in the wasmtime project.
• Make sure your addition maintains the alphabtical order of the list.
• Make sure your addition contains a description besides the link.