Update Orbit repo.

Change-Id: Ia651faf1cb98c0108d54d89106d05d0d603825e1
diff --git a/releng/org.eclipse.linuxtools.target/linuxtools-e4.8.target b/releng/org.eclipse.linuxtools.target/linuxtools-e4.8.target
index ad7b7b0..98df787 100644
--- a/releng/org.eclipse.linuxtools.target/linuxtools-e4.8.target
+++ b/releng/org.eclipse.linuxtools.target/linuxtools-e4.8.target
@@ -58,7 +58,7 @@
 <unit id="org.objectweb.asm.util" version="6.2.1.v20180823-1831"/>
 <unit id="org.slf4j.api" version="1.7.10.v20170428-1633"/>
 <unit id="org.swtchart" version="0.10.0.v201605200358"/>
-<repository location="http://download.eclipse.org/tools/orbit/downloads/drops/S20180829155938/repository"/>
+<repository location="http://download.eclipse.org/tools/orbit/downloads/drops/R20180905201904/repository"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.jdt.core" version="0.0.0"/>