Fix mke2fs and debugfs to support large (> 16 bit) uid's and gid's

Fix mke2fs and debugfs to support large (> 16 bit) uid's and gid's

Mke2fs is supposed to set the uid/gid ownership of the root directory when
a non-rooot user creates the filesystem.  This wasn't working correctly
if the uid/gid was > 16 bits.   In additional, debugfs wasn't displaying
large uid/gid's correctly.  This patch fixes these two programs.

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