After we update rust to rust-1.45, cargo install now create
.crates2.json instead of .crates.toml. So the hack we use in
c1cc0c4865a8bfff43c5c9bd6ae8dcadb061c8a0 doesn't work.

I checked the ArchLinux Rust packaging guideline and found that we
should use --no-track in "cargo install" to prevent cargo install these
files to prefix.