update product.mk
vendor: Show more hardware information about the device [2/3]

You need to add the following values:
    echo "ro.device.chipset=value"
    echo "ro.device.cpu_info=value"
    echo "ro.device.gpu=value"
    echo "ro.device.rear_cam=value"
    echo "ro.device.front_cam=value"
    echo "ro.device.screen_res=value"

PS12: Added all htc devices supported by pac
PS13: rename cpu to cpu_type
      add cpu info
      see http://i.imgur.com/UrQE2Jq.png
PS14: Added all samsung devices supported by pac
PS15: Added all sony and xiaomi devices supported by pac
PS17: Added all devices supported by pac
PS18: Change if-else by switch
PS19: Fix derp....
ps20: Fix quote characters thanks to Andrew Sterling xD

Change-Id: I3035ca414e4ae284e823b3e5881da825f29a6fbe

(cherry picked from commit 7f6dacd888eeb3a467b722fd6d046c5e4cf0be56)