6781363: New I/O: Update socket-channel API to jsr203/nio2-b99
4313887: New I/O: Improved filesystem interface
4607272: New I/O: Support asynchronous I/O
Reviewed-by: sherman, chegar
// policy file that grants read access to source directory and its entries
grant {
permission java.io.FilePermission "${test.src}", "read";
permission java.io.FilePermission "${test.src}${file.separator}*", "read";
};