Update to linix-3.18.1. 
Update to xz-5.2.0. 
Update to binutils-2.25. 
Update comments for sysklogd boot script.


git-svn-id: svn://svn.linuxfromscratch.org/LFS/trunk@10808 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689