[vector-api][X86] Intrinsic creation for missing cases of iotaShuffle API

[Bhateja, Jatin]

Hi All,

Please find below a patch which intrinsifies following missing cases of iotaShuffle :-

  1.  scale > 1.
  2.  wrap = false.

http://cr.openjdk.java.net/~jbhateja/vectorIntrinsics/IotaShuffle/webrev.00/

Kindly review.

Best Regards,
Jatin