Check for high parts of other inode properties in fstat

[jhermsmeier]

Notably, l_i_uid_high, l_i_gid_high, and l_i_blocks_high in https://github.com/resin-io/node-ext2fs/blob/eaff7b823692ef578779b24276605fcd61d06063/src/node_ext2fs.cc#L839

See also: https://lwn.net/Articles/254535/