stop build on jsp compile errors

apps/i2ptunnel/java/build.xml

@@ -55,7 +55,7 @@
         <mkdir dir="../jsp/WEB-INF/" />
         <mkdir dir="../jsp/WEB-INF/classes" />
         <!-- there are various jspc ant tasks, but they all seem a bit flakey -->
-        <java classname="org.apache.jasper.JspC" fork="true" >
+        <java classname="org.apache.jasper.JspC" fork="true" failonerror="true">
             <classpath>
                 <pathelement location="../../jetty/jettylib/jasper-compiler.jar" />
                 <pathelement location="../../jetty/jettylib/jasper-runtime.jar" />

apps/routerconsole/java/build.xml

@@ -86,7 +86,7 @@
         <mkdir dir="../jsp/WEB-INF/" />
         <mkdir dir="../jsp/WEB-INF/classes" />
         <!-- there are various jspc ant tasks, but they all seem a bit flakey -->
-        <java classname="org.apache.jasper.JspC" fork="true">
+        <java classname="org.apache.jasper.JspC" fork="true" failonerror="true">
             <classpath>
                 <pathelement location="../../jetty/jettylib/jasper-compiler.jar" />
                 <pathelement location="../../jetty/jettylib/jasper-runtime.jar" />

apps/susidns/src/build.xml

@@ -35,7 +35,7 @@
         <delete file="WEB-INF/web-out.xml" />
     	<mkdir dir="${tmp}" />
         <echo message="Ignore any warning about /WEB-INF/web.xml not found" />
-        <java classname="org.apache.jasper.JspC" fork="true" classpathref="cp">
+        <java classname="org.apache.jasper.JspC" fork="true" classpathref="cp" failonerror="true">
             <arg value="-d" />
             <arg value="${tmp}" />
             <arg value="-v" />