Add support for virtualbox touchpanel touch events

Open-webOS-DCO-1.0-Signed-off-by: Janne Kiiski <janne.kiiski@palm.com>

Change-Id: I9b8b1ce413aad270d577470ebcd0c4693f6798f4
Reviewed-on: http://g2g.palm.com/1271
Reviewed-by: Build Verification
Reviewed-by: Janne Kiiski <janne.kiiski@palm.com>
Tested-by: Janne Kiiski <janne.kiiski@palm.com>
Reviewed-by: Keith Derrick <keith.derrick@palm.com>