topic-tools: Corrected md5 hash of license

Since its initial contribution in f73e30ae,
the topic-tools had an untested md5 hash for the license check.

recipes-ros/ros-comm/topic-tools_1.9.41.bb

@@ -2,7 +2,7 @@ DESCRIPTION = "rostopic contains the rostopic command-line tool for displaying d
 ROS Topics, including publishers, subscribers, publishing rate, and ROS Messages."
 SECTION = "devel"
 LICENSE = "BSD"
-LIC_FILES_CHKSUM = "file://package.xml;beginline=17;endline=17;md5=d566ef916e9dedc494f5f793a6690ba5"
+LIC_FILES_CHKSUM = "file://package.xml;beginline=17;endline=17;md5=68b329da9893e34099c7d8ad5cb9c940"
 
 DEPENDS = "rostest-native roscpp"