credit Jason Zhang for tallow task

git-svn-id: https://svn.apache.org/repos/asf/ant/antlibs/dotnet/trunk@772086 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/contributors.xml b/contributors.xml
index 3c80563..daa6220 100644
--- a/contributors.xml
+++ b/contributors.xml
@@ -55,6 +55,10 @@
     <last>Brosius</last>
   </name>
   <name>
+    <first>Jason</first>
+    <last>Zhang</last>
+  </name>
+  <name>
     <first>Niklas</first>
     <last>Deutschmann</last>
   </name>