package_list: let's enable acpica again

It is needed for qemu
package_list: add qemu

qemu is 1.7 in Factory now. Remove the kvm entry as kvm no longer
exists (was merged to qemu in 1.6).
libreoffice: add some required packages
Merge pull request #29 from jirislaby/master

acpica+qemu+libreoffice