qemu: Allow others to browse /var/lib/libvirt/qemu

qemu: Allow others to browse /var/lib/libvirt/qemu

Commit f1f68ca33433 tried fixing running multiple domains under various
users, but if the user can't browse the directory, it's hard for the
qemu running under that user to create the monitor socket.

The permissions need to be fixed in two places in the spec file due to
support for both installations with and without driver modules.

Creating a directory with '$(MKDIR_P) -m' shouldn't fail even on systems
where autoconf needs to fallback to 'install-sh -d'.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1146886

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>