RFR (S) 8214341 [lworld][C1] implement anewarray for value type for C1

[Ioi Lam]

http://cr.openjdk.java.net/~iklam/valhalla/8214341-c1-anewarray.v01/
https://bugs.openjdk.java.net/browse/JDK-8214341

The patch is on top of Fred's patch for JDK-8214307 (nested flattened 
fields).

Most of the logic is shared with NewObjectArray, so I just sprinkled
the code with test for value-type arrays.

I tested with very basic stuff (see the added test cases 36 and 37 in
TestBasicFunctionality).

Thanks
- Ioi