[foreign] RFR Bounded Pointer, MemoryRegion bounds checks

[Sundararajan Athijegannathan]

Please review: 
http://cr.openjdk.java.net/~sundar/memory_region_bound_checks/webrev.00/

Piggybacking to remove 'errno' test in StdLibTest.java As (privately) 
discussed with Maurizio Cimadamore, Henry Jen and Mikael Vidstedt, errno 
test is broken/wrong. Apart from multithreading issues (we need to call 
int* errno() and not access errno global var), errno checking in Java 
code won't work without JVM changes to facilitate that. i.e., Hotspot 
doesn’t expect errno the be accessed in Java code.

Thanks,
-Sundar