RFR 8227065 [lworld][c1] runtime.valhalla.valuetypes.ValueTypeArray fails with C1

[Ioi Lam]

https://bugs.openjdk.java.net/browse/JDK-8227065
http://cr.openjdk.java.net/~iklam/valhalla/8227065-ValueTypeArray-fails-with-c1.v01/

The bug is in Runtime1::new_value_array(). It should initialize the 
value class
as necessary (similar to how the interpreter handles it).

I added two new test cases in 
compiler/valhalla/valuetypes/TestUnloadedValueTypeArray.java

Thanks
- Ioi