HACKING: add more descriptions for test options

also added the site of virt-manager translate project.

Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
Merge branch 'master' of https://git.fedorahosted.org/git/virt-manager
Merge branch 'master' of https://github.com/noskill/virt-manager