Don't optimise guava jar

Change-Id: I9525599c00a7c67bbb9a5f5c954f13417a7e602f
Reviewed-on: http://gerrit.dmdirc.com/2960
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

build.xml

             -injars lib/main/guava.jar
             -outjars build/guava.jar
 
+            -dontoptimize
             -dontobfuscate
             -dontpreverify
             -dontwarn
       </proguard>
 
       <jar destfile="${dist.jar}" update="true">
-            <zipfileset src="build/guava.jar" includes="com/google/**"/>
+          <zipfileset src="build/guava.jar" includes="com/google/**"/>
       </jar>
     </target>