Add org.tukaani.xz lib

	new file:   lib/org.tukaani.xz/.classpath
	new file:   lib/org.tukaani.xz/.project
	new file:   lib/org.tukaani.xz/.settings/org.eclipse.jdt.core.prefs
	new file:   lib/org.tukaani.xz/.settings/org.eclipse.m2e.core.prefs
	new file:   lib/org.tukaani.xz/META-INF/MANIFEST.MF
	new file:   lib/org.tukaani.xz/build.properties
	new file:   lib/org.tukaani.xz/pom.xml
	new file:   lib/org.tukaani.xz/xz.jar
	modified:   trace/net.sf.milkfish.parent/pom.xml