LU-13197 debugfs: print inode numbers as unsigned

LU-13197 debugfs: print inode numbers as unsigned

Print inode numbers as unsigned values, to avoid printing negative
numbers for inodes above 2B.

Flags should be printed as hex instead of signed decimal values.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I4f3b318016bc5ff5915967a616a7a92ef83ebbe5
Reviewed-on: https://review.whamcloud.com/37442
Reviewed-by: Wang Shilong <wshilong@ddn.com>
Reviewed-by: Arshad Hussain <arshad.super@gmail.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>