Releng: use boot OT/J compiler to create new compiler for phase 2

- avoid first install of patch into base to avoid prob with update
  (that install never worked in successful builds)
diff --git a/releng/build-scripts/build/p2helper.xml b/releng/build-scripts/build/p2helper.xml
index 0f6512e..c6eb453 100644
--- a/releng/build-scripts/build/p2helper.xml
+++ b/releng/build-scripts/build/p2helper.xml
@@ -106,11 +106,13 @@
 
     <target name="installOTDT">
     	<echo message="Installing the OTDT from ${otdtUpdatesDir} into ${test.eclipseDir}"/>
+        <!-- to simulate update -->
+    	<!--
         <antcall target="revert">
-        	<!-- to simulate update -->
             <param name="tagName" value="beforePatch"/>
             <param name="targetEclipseDir" value="${test.eclipseDir}"/>
         </antcall>
+        -->
         <antcall target="installFeature">
             <param name="feature" value="org.eclipse.objectteams.otequinox.feature.group"/>
             <param name="sourceUpdatesDir" value="${otdtUpdatesDir}"/>
diff --git a/releng/build-scripts/build/run.xml b/releng/build-scripts/build/run.xml
index e9b2f72..d0261ef 100644
--- a/releng/build-scripts/build/run.xml
+++ b/releng/build-scripts/build/run.xml
@@ -285,6 +285,7 @@
 	            <jvmarg value="${vm.args}"/>
         </java>
 		<!-- Now we should have an update site with the patch feature, time to install it into base: -->
+<!--
         <ant antfile="${OTScriptDir}/p2helper.xml" target="tagState" dir="${baseLocation}">
             <property name="tagName" value="beforePatch"/>
             <property name="targetEclipseDir" value="${baseLocation}"/>
@@ -294,6 +295,7 @@
             <property name="sourceUpdatesDir" value="${otdtUpdatesDir}"/>
             <property name="targetEclipseDir" value="${baseLocation}"/>
         </ant>
+-->
     </target>
 
 	<!-- ==== BUILD STAGE 2: ==== -->