pointercal-xinput: add a dummy calibration file for qemu

pointercal-xinput: add a dummy calibration file for qemu

In qemu, the emulated PS/2 mouse reports itself as an "absolute coordinate"
device and that makes xinput_calibrator think it could be calibrated.

Add a dummy calibration file as a work around to prevent xinput_calibrator from
popping up on every boot in qemu.

[YOCTO #8380]

Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>