Update the templates and configuration files to support grub2 live
image creation.
Related: rhbz#1102318
Related: rhbz#1131199
(cherry picked from commit da8326fd58)
The ppc config files were missing from the live config_files directory
and ppc needs the correct lib directory so lmc has been switched to use
ArchData driven from the installed kernel arch.
Resolves: rhbz#1102318
(cherry picked from commit 59f256e989)