Need reviewer for forward port of 6815768 (File.getXXXSpace) and 6815768 (String.hashCode)

[Alan Bateman]

There are two fixes in Sun's proprietary jdk6 updates that should also 
be fixed in OpenJDK.

The first one is that the File.getXXXSpace methods use statvfs instead 
of statvfs64 and so fail on 32-bit Solaris and Linux with very large 
file systems. The webrev is here:
  http://cr.openjdk.java.net/~alanb/6815768/webrev.00/
The GetXSpace test already covers these methods and an additional test 
isn't required.

The second one is a scalability fix to String.hashCode to avoid storing 
the hash code of empty strings. The webrev with the change is here:
  http://cr.openjdk.java.net/~alanb/6815768/webrev/

Thanks,
Alan.