[pkgsel] Add xresprobe, discover and laptop detect for hw detection

[Free Ekanayaka <free@64studio.com>]

Hi,

I'm wondering if it would make sense to add

xresprobe
discver
laptop-detect

to the list  of packages which get  installed before the X server.  As
far a I know,  if available, they are  used by the postinst scripts of
xserver-xorg.

Cheers,

Free