[lld] r174148 - add hexagon scatter bits and split hexgontargethandler to hexagonrelocationhander

[Shankar Easwaran]

Hi David,

Thanks for your inputs. Will seperate them in the future.

Its hard to add a test case for every instruction but it would be good 
to add.

I will try to add atleast few of them as time goes on.

Thanks

Shankar Easwaran