Ensure installation under debian/tmp.
Ensure installation under debian/tmp.

This is not strictly needed since there are several binaries built from this
source package, so debhelper uses debian/tmp rather than debian/$package.
But let's make all drivers use a similar debian/rules file. Also, a binary
package might be dropped at some point.

philipn/xserver-xorg-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,philipn/xserver-xorg-input-synaptics,philipn/xserver-xorg-input-synaptics