Tools: add separate jmavsim_run.sh script

It is useful to run jmavsim separately, for example when debugging mainapp
separately, or running some other external tool on mainapp (like heap
analysis)

Tools/jmavsim_run.sh

@@ -0,0 +1,8 @@
+#! /bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$SCRIPT_DIR/jMAVSim"
+
+ant create_run_jar copy_res
+cd out/production
+java -Djava.ext.dirs= -jar jmavsim_run.jar -udp 127.0.0.1:14560