cargo-install: move binaries from the build dir if possible
cargo-install: move binaries from the build dir if possible

Try moving the binaries (and fall back to copying) if the build
directory is a temporary one (source isn't a local path).

tshepang/cargo,achanda/cargo,rustyhorde/cargo,eminence/cargo,rust-lang/cargo,blaenk/cargo,blaenk/cargo,achanda/cargo,tshepang/cargo,AndiDog/cargo,mark-buer/cargo,sbeckeriv/cargo,vojtechkral/cargo,brson/cargo,blaenk/cargo,mark-buer/cargo,vojtechkral/cargo,rustyhorde/cargo,eminence/cargo,achanda/cargo,tsurai/cargo,tsurai/cargo,tshepang/cargo,rust-lang/cargo,brson/cargo,achanda/cargo,mark-buer/cargo,durka/cargo,rust-lang/cargo,tsurai/cargo,nipunn1313/cargo,tsurai/cargo,brson/cargo,tshepang/cargo,nipunn1313/cargo,tsurai/cargo,durka/cargo,rustyhorde/cargo,brson/cargo,sbeckeriv/cargo,eminence/cargo,AndiDog/cargo,blaenk/cargo,sbeckeriv/cargo,brson/cargo,vojtechkral/cargo,eminence/cargo,mark-buer/cargo,AndiDog/cargo,mark-buer/cargo,vojtechkral/cargo,rust-lang/cargo,AndiDog/cargo,durka/cargo,durka/cargo,AndiDog/cargo,nipunn1313/cargo,rustyhorde/cargo,nipunn1313/cargo,blaenk/cargo,sbeckeriv/cargo