configure.ac: release 0.8
configure.ac: release 0.8

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

ralt/lxcfs,rhatdan/lxcfs,evgeni/pkg-lxcfs-debian,Xeno22/lxcfs,evgeni/pkg-lxcfs-debian,Xeno22/lxcfs,ralt/lxcfs,rhatdan/lxcfs