resize2fs: Fix resizing filesystems with large inodes

resize2fs: Fix resizing filesystems with large inodes

Use ext2fs_get_next_inode_full() in resize2fs and clean up large inode
handling; previous attempt was not properly handling all cases, and
was incorrectly setting i_extra_isize.  This caused some extended
attributes to get removed or randomly assigned to other inodes as a
result of the resize, which can be unfortunate on systems using
SELinux.

The previous commit didn't fix things completely on big-endian systems
like PowerPC.

Addresses-Red-Hat-Bugzilla: #434893

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>