Request for reviews (L): 6823354: Add intrinsics for{Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()

[Christian Thalinger]

Here is the third version of the patch:

http://cr.openjdk.java.net/~twisti/6823354/webrev.03/

This version includes all suggested changes from Vladimir and changes I
talked about with Tom on the phone.  Additionally I enhanced the
testcase.

-- Christian