Fixed the Java Lite build.
diff --git a/java/lite/generate-test-sources-build.xml b/java/lite/generate-test-sources-build.xml
index 62bca93..65e62ce 100644
--- a/java/lite/generate-test-sources-build.xml
+++ b/java/lite/generate-test-sources-build.xml
@@ -4,6 +4,7 @@
<arg value="--java_out=lite:${generated.testsources.dir}"/>
<arg value="--proto_path=${protobuf.source.dir}"/>
<arg value="--proto_path=${protobuf.basedir}/java/core/${test.proto.dir}"/>
+ <arg value="${protobuf.source.dir}/google/protobuf/descriptor.proto"/>
<arg value="${protobuf.source.dir}/google/protobuf/unittest.proto"/>
<arg value="${protobuf.source.dir}/google/protobuf/unittest_import.proto"/>
<arg value="${protobuf.source.dir}/google/protobuf/unittest_import_lite.proto"/>
