velodyne: Update to version 1.2.0

Bump from Velodyne version 1.1.2 (Nov 2013) to the latest release,
1.2.0 (Aug 2014).  This version includes a fix to support yaml-cpp
1.5+ so resolves #325 [1].

[1] https://github.com/bmwcarit/meta-ros/issues/325



Signed-off-by: Ash Charles <ashcharles@gmail.com>

recipes-ros/velodyne/velodyne.inc

 SRC_URI = "https://github.com/ros-drivers/${ROS_SPN}/archive/${ROS_SP}.tar.gz;downloadfilename=${ROS_SP}.tar.gz"
-SRC_URI[md5sum] = "07caaeccf72dd910907369a4eadc0dca"
-SRC_URI[sha256sum] = "6ca923f662679e3286f33a511c1fb267a59d5f73e37752e249a69de5902cf756"
+SRC_URI[md5sum] = "72417eb244903e824bd775ab74879982"
+SRC_URI[sha256sum] = "b767ccd50aa8981884398c88a1b292e43e27410fdb5801684cef7bfa8e8cd667"
 
 S = "${WORKDIR}/${ROS_SPN}-${ROS_SP}/${ROS_BPN}"