Make use of libnss_myhostname shipped by systemd

git-svn-id: http://svn.linuxfromscratch.org/LFS/branches/systemd/BOOK@10438 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/glibc.xml

@@ -269,7 +269,7 @@ passwd: files
 group: files
 shadow: files
 
-hosts: files dns
+hosts: files dns myhostname
 networks: files
 
 protocols: files