Bug 573166 Build stand-alone MAT packages with a newer Eclipse release

Fix target platform for new Tycho, ignore missing file
on tidy of unneeded files.

Change-Id: Ic861c96e6caaf1b49ab8aa8ca91fa5ef42459195
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=573166

org.eclipse.mat.product/pom.xml

@@ -107,7 +107,7 @@
 								<configuration>
 									<target>
 										<!--  Remove unneeded executable -->
-										<delete includeemptydirs="false">
+										<delete includeemptydirs="false" failonerror="false">
 											<fileset dir="${project.build.directory}/products/org.eclipse.mat.ui.rcp.MemoryAnalyzer/macosx/cocoa/x86_64/mat.app/Contents/Eclipse/p2/org.eclipse.equinox.p2.core/cache/">
 												<include name="**" />
 											</fileset>

org.eclipse.mat.targetdef/mat-2020-03.target

@@ -24,7 +24,7 @@
 <unit id="org.eclipse.birt.chart.engine.extension" version="0.0.0"/>
 <repository location="https://download.eclipse.org/birt/update-site/oxygen-interim/"/>
 </location>
-<location includeAllPlatforms="false" includeMode="planner" type="InstallableUnit">
+<location includeAllPlatforms="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="com.ibm.dtfj.feature.feature.group" version="0.0.0"/>
 <repository location="http://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/runtimes/tools/dtfj/"/>
 </location>