Set latest nightly to 2019-09

Change-Id: Ia9ed91bca82044a33a8af36d17af6cc5c92544e9
diff --git a/releng/toolkit/downloads/updates/nightly/latest/compositeArtifacts.xml b/releng/toolkit/downloads/updates/nightly/latest/compositeArtifacts.xml
index c637301..f9cc600 100644
--- a/releng/toolkit/downloads/updates/nightly/latest/compositeArtifacts.xml
+++ b/releng/toolkit/downloads/updates/nightly/latest/compositeArtifacts.xml
@@ -6,6 +6,6 @@
     <property name='p2.timestamp' value='!!__TIMESTAMP__!!'/>
   </properties>
   <children size='1'>
-	<child location="https://https://download.eclipse.org/gendoc/updates/nightly/latest/" />
+	<child location="https://download.eclipse.org/gendoc/updates/nightly/latest/2018-09/" />
   </children>
 </repository>
\ No newline at end of file
diff --git a/releng/toolkit/downloads/updates/nightly/latest/compositeContent.xml b/releng/toolkit/downloads/updates/nightly/latest/compositeContent.xml
index 19d30be..006199a 100644
--- a/releng/toolkit/downloads/updates/nightly/latest/compositeContent.xml
+++ b/releng/toolkit/downloads/updates/nightly/latest/compositeContent.xml
@@ -6,6 +6,6 @@
 		<property name="p2.timestamp" value="!!__TIMESTAMP__!!" />
 	</properties>
 	<children size="1">
-		<child location="https://download.eclipse.org/gendoc/updates/nightly/latest/" />
+		<child location="https://download.eclipse.org/gendoc/updates/nightly/latest/2018-09/" />
 	</children>
 </repository>
\ No newline at end of file