storage/posix: transform inode number in stat structure
storage/posix: transform inode number in stat structure

- when export directory is configured to span across multiple mountpoints,
    the inode number has to be transformed in order to make it unique.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 254 (storage/posix has to do inode number transformation wherever it unwinds with a stat structure)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=254

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster