Update Mylyn to 3.21.0.v20160907-0318 on master.
diff --git a/mylyn.b3aggrcon b/mylyn.b3aggrcon
index b801a06..ca30e85 100644
--- a/mylyn.b3aggrcon
+++ b/mylyn.b3aggrcon
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="ASCII"?>
 <aggregator:Contribution xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:aggregator="http://www.eclipse.org/b3/2011/aggregator/1.1.0" label="Mylyn">
-  <repositories location="http://download.eclipse.org/mylyn/drops/3.21.0/v20160824-1713" description="Mylyn Updates">
-    <features name="org.eclipse.mylyn_feature.feature.group" versionRange="3.21.0.v20160818-1734">
+  <repositories location="http://download.eclipse.org/mylyn/drops/3.21.0/v20160907-0318" description="Mylyn Updates">
+    <features name="org.eclipse.mylyn_feature.feature.group" versionRange="3.21.0.v20160901-1744">
       <categories href="simrel.b3aggr#//@customCategories[identifier='Collaboration']"/>
     </features>
     <features name="org.eclipse.mylyn.bugzilla_feature.feature.group" versionRange="3.21.0.v20160716-0541">
@@ -55,9 +55,9 @@
     <features name="org.eclipse.mylyn.commons.repositories.http.feature.group" versionRange="1.13.0.v20160630-1702"/>
     <features name="org.eclipse.mylyn.commons.sdk.feature.group" versionRange="3.21.0.v20160729-1739"/>
     <features name="org.eclipse.mylyn.context.sdk.feature.group" versionRange="3.21.0.v20160815-2336"/>
-    <features name="org.eclipse.mylyn.reviews.feature.feature.group" versionRange="2.12.0.v20160719-2354"/>
-    <features name="org.eclipse.mylyn.reviews.sdk.feature.feature.group" versionRange="2.12.0.v20160719-2354"/>
-    <features name="org.eclipse.mylyn.sdk_feature.feature.group" versionRange="3.21.0.v20160818-1734"/>
+    <features name="org.eclipse.mylyn.reviews.feature.feature.group" versionRange="2.12.0.v20160819-2206"/>
+    <features name="org.eclipse.mylyn.reviews.sdk.feature.feature.group" versionRange="2.12.0.v20160819-2206"/>
+    <features name="org.eclipse.mylyn.sdk_feature.feature.group" versionRange="3.21.0.v20160901-1744"/>
     <features name="org.eclipse.mylyn.tasks.ide.feature.group" versionRange="3.21.0.v20160630-2019"/>
     <features name="org.eclipse.mylyn.versions.feature.group" versionRange="1.13.0.v20160630-2022"/>
     <features name="org.eclipse.mylyn.versions.sdk.feature.group" versionRange="1.13.0.v20160630-2022"/>