imx-gpu-viv: add G2D libs and GPU tools selection

GPU package now includes libraries for GPU2D as well as several tools to
monitor and debug the GPUs.

GPU2D libraries have been tested with the example provided in the
package:
 # /usr/share/examples/fsl-samples/g2d/overlay_test/g2d_overlay_test
 Overlay rendering time 53861us .

The tools have been tested with the following commands:
 # cd /usr/share/examples/viv_samples/vdk/
 # apitrace trace --api egl ./tutorial7 &
 # gmem_info
 ... display memory use per PID ...
 # killall tutorial7
 # apitrace replay tutorial7.trace
 # eglretrace tutorial7.trace

[Thomas: tweak the installation logic to be more explicit about paths
being copied, and to use cp -dpfr consistently.]

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>