[releng] lock down P2 repo for linuxtools

Change-Id: I8fcf85c32db2b19a270dc457d1b3f12cbd7633f0

releng/org.eclipse.cdt.target/cdt.target

diff --git a/releng/org.eclipse.cdt.target/cdt.target b/releng/org.eclipse.cdt.target/cdt.target
index 0efc051..18bdff4 100644
--- a/releng/org.eclipse.cdt.target/cdt.target
+++ b/releng/org.eclipse.cdt.target/cdt.target
@@ -58,7 +58,7 @@
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.linuxtools.docker.feature.feature.group" version="0.0.0"/>
-<repository location="http://download.eclipse.org/linuxtools/updates-docker-nightly-4.1/"/>
+<repository location="http://download.eclipse.org/linuxtools/update-docker-4.0.1"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.wst.xml_ui.feature.feature.group" version="0.0.0"/>