Your error is unable to find the required library: /tools/dx.jar
so my question is have changed anything in buildserver/build.xml file like this line is available or not <copy toFile="${public.deps.dir}/dx.jar" file="${lib.dir}/android/tools/dx.jar" />
You should be checking buildserver/build.xml, not components/build.xml, as the former is used to set up the file structure for builds. There should be a reference to dx.jar there where it is copied to the tools directory. You may want to try cleaning the buildserver module and rebuilding it.
Thank you so much i just checked that file i was shocked there was no dx.jar reference i just updated my build.xml and my android/tools folder to latest and it starts building.