ext4_utils: Fix long symbolic links

When the target of a symbolic link is over 60 characters, make_ext4fs
fails to create the link.

Instead of allocating n bytes, n blocks of 4096 bytes was reserved,
and the allocated data was never attached to the inode.

Change-Id: I63a2e76166a2afc30734265324d5c5265cfa59ff
Signed-off-by: Christian Bejram <christian.bejram@stericsson.com>
1 file changed