package/rust: bump to 1.40

package/rust: bump to 1.40

- remove of the llvm workaround patch as it is integrated in this
  newer version.
- bump cargo-bin to 0.41 (corresponds to rust 1.40) and update
  licenses hashes.
- bump rust-bin to 1.40.

Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: David Pierret <david.pierret@smile.fr>
Tested-by: David Pierret <david.pierret@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>