BoardConfig.mk: Force a "back" menu item in recovery

We will probably never build a recovery from the gingerbread branch,
but might as well keep this in here, as CWM Recovery is basically
useless without it on this tiny device.
Add init.u8185.rc and ueventd.u8185.rc

Straight from the ICS branch.
device_u8185.mk: Copy init.u8185.rc and uventd.u8185.rc to root
init.u8185.rc: Remove duplicate services

These are defined already by CM's init.rc.