wipe-sysroot: explain what is being deleted, and check for arguments

Print the directories that will be deleted, and add a rudimentary check for
arguments and display a message if arguments were passed.

[ YOCTO #5423 ]

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
e2fsprogs: silence debugfs

debugfs echos the commands when it is executing a script, but as the scripts
used at rootfs time are long this massively inflates the do_rootfs log.

Comment out the echo so that the rootfs isn't 20K lines longer than it needs to
be.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>