multitouch fix

according to the https://github.com/CyanogenMod/android_device_lge_p970/commit/72a24172de2c7875b63159c19bb418225db8b1fa#configs/hub_synaptics_touch.idc
and http://forum.xda-developers.com/showpost.php?p=37146563&postcount=4752
this could fixed the multi touch issue for the browser and gallery.