* build.xml: Build speedups:

- Don't distclean in the updaterRouter target
      - Don't make prepUpdate and prepupdateSmall depend
        on distclean
      - Don't make susimail build always clean
      - Make pkg depend on distclean to be sure
      - Clean out more routerconsole and susidns files in 'ant clean'
      - i2ptunnel, routerconsole, susidns:
        Only build WEB-INF when necessary
      - systray: Only build jar when necessary
      - Don't build i2psnark standalone for the updater target

apps/i2ptunnel/java/build.xml

@@ -30,7 +30,7 @@
              basedir="../jsp/" excludes="web.xml, *.java, *.jsp">
         </war>
     </target>
-    <target name="precompilejsp">
+    <target name="precompilejsp" unless="precompilejsp.uptodate">
         <delete dir="../jsp/WEB-INF/" />
         <delete file="../jsp/web-fragment.xml" />
         <delete file="../jsp/web-out.xml" />
@@ -72,6 +72,11 @@
             <replacefilter token="&lt;!-- precompiled servlets --&gt;" value="${jspc.web.fragment}" />
         </replace>
     </target>
+
+    <uptodate property="precompilejsp.uptodate" targetfile="../jsp/web-out.xml">
+        <srcfiles dir= "../jsp" includes="*.jsp, *.html, web.xml"/>
+    </uptodate>
+
     <target name="javadoc">
         <mkdir dir="./build" />
         <mkdir dir="./build/javadoc" />
@@ -84,6 +89,9 @@
     </target>
     <target name="clean">
         <delete dir="./build" />
+        <delete dir="../jsp/WEB-INF/" />
+        <delete file="../jsp/web-fragment.xml" />
+        <delete file="../jsp/web-out.xml" />
     </target>
     <target name="cleandep" depends="clean">
 	<!-- ministreaming will clean core -->