xf86-input-synaptics: failed to build on arm and mips

Hi folks,

I met this error when "bitbake world" (MACHINE=qemuarm)

| configure.ac:1:   run info '(automake)Extending aclocal'
| configure.ac:1:   or see http://www.gnu.org/software/automake/manual/automake.html#Extending-aclocal
| configure.ac:53: error: must install xorg-server development files before running autoconf/autogen

The problem is that arm's virtual/xserver="xserver-kdrive", but what it needs is xserver-xorg, it built success after bitbake xserver-xorg, I don't know whether this is a problem or not, the only thing is that it breaks the bitbake world, maybe we should not build it when "bitbake world" (MACHINE=qemuarm)?

The same error happened to mips when bitbake xf86-input-synaptics (I haven't tried ppc yet, I think it should have the same error).

Thanks

Robert