Adding forgotten duration.proto to the lite library
diff --git a/java/lite/pom.xml b/java/lite/pom.xml
index 8730105..a5224ce 100644
--- a/java/lite/pom.xml
+++ b/java/lite/pom.xml
@@ -52,6 +52,7 @@
<includes>
<include>google/protobuf/any.proto</include>
<include>google/protobuf/api.proto</include>
+ <include>google/protobuf/duration.proto</include>
<include>google/protobuf/empty.proto</include>
<include>google/protobuf/field_mask.proto</include>
<include>google/protobuf/source_context.proto</include>