Fix broken bikeshed/build.xml compile rule


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7873 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/bikeshed/build.xml b/bikeshed/build.xml
index 92ddef0..77f643a 100644
--- a/bikeshed/build.xml
+++ b/bikeshed/build.xml
@@ -25,6 +25,7 @@
     <mkdir dir="${javac.out}" />
     <gwt.javac excludes="**/sample/**">
       <classpath>
+        <pathelement location="${gwt.tools.redist}/json/r2_20080312/json.jar" />
         <pathelement location="${gwt.dev.jar}" />
         <pathelement location="${gwt.user.jar}" />
       </classpath>