Gnome Keyring policies

Gnome keyring communicates with other programs via a socket in
~/.cache/. This patch creates gnome_xdg_*_home_t labels and lets
gnome keyring manage them

Signed-off-by: Jason Zaman <jason@perfinion.com>
gconfd keeps its database in the xdg directories

gconfd stores settings for applications in the gnome desktop.
it needs to be able to manage gnome directories inside
~/.{cache,config,local}/

Signed-off-by: Jason Zaman <jason@perfinion.com>