meta-overc: make lxdm rdepends on xfce-base and x11-base
meta-overc: make lxdm rdepends on xfce-base and x11-base

in order to make sure lxdm is installed after xfce-base
and x11-base, add these two rdepends to lxdm.

Signed-off-by: fli <30fd179d1a704171deeab5eaee24dcfab6c509a1@windriver.com>

OverC/meta-overc,OverC/meta-overc,mufeng/meta-overc,masselstine/meta-overc,masselstine/meta-overc,OverC/meta-overc,OverC/meta-overc,WindRiver-OpenSourceLabs/meta-overc,WindRiver-OpenSourceLabs/meta-overc,masselstine/meta-overc,WindRiver-OpenSourceLabs/meta-overc,jwessel/meta-overc,jwessel/meta-overc,masselstine/meta-overc,jwessel/meta-overc,mufeng/meta-overc,OverC/meta-overc,OverC/meta-overc,mufeng/meta-overc