RFR 8246040: java/foreign/TestAddressHandle fails on big endian platforms

[Maurizio Cimadamore]

Hi,
following integration of second iteration of foreign memory access API, 
one of the new tests started acting up on big endian platforms (thanks 
to Thomas Stüfe for catching this!).

Here's a fix:

http://cr.openjdk.java.net/~mcimadamore/8246040_v1/webrev/

Cheers
Maurizio