Add lastIndexOf with array target in primitives' utility classes

[sim642]

Primitives' utility classes such as Bytes have methods like

• indexOf(byte[] array, byte target)
• indexOf(byte[] array, byte[] target)
• lastIndexOf(byte[] array, byte target)
  for working with arrays of those primitives.

Unfortunately the indexOf and lastIndexOf aren't symmetric in this case as there isn't a method like lastIndexOf(byte[] array, byte[] target), taking an array as target in the lastIndexOf case. Hereby I propose that such method be added to Bytes and other analogous primitives' utility classes.

[blzb]

I really need this too.

[fdesu]

I come across this functionality and wanted to contribute it. I've already created PR with a draft of the changes for int lastIndexOf(array[], target[]). I've created PR to gather an early feedback to not waste anyone's time to understand if there is still need in such an enhancement and if yes wether I go the right way.