releng: Update e4.21 and eStaging targets for 2021-09 M3

Change-Id: I9db4689d878892a6e7a0b32c6da41d444661a0fc
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/184405
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>

releng/org.eclipse.tracecompass.target/tracecompass-e4.21.target

@@ -1,9 +1,9 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?><?pde version="3.8"?><target name="tracecompass-e4.21" sequenceNumber="3">
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><?pde version="3.8"?><target name="tracecompass-e4.21" sequenceNumber="4">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.cdt.gnu.dsf.feature.group" version="0.0.0"/>
 <unit id="org.eclipse.tm.terminal.control" version="0.0.0"/>
-<repository location="https://download.eclipse.org/tools/cdt/builds/10.4/cdt-10.4.0-m1a/"/>
+<repository location="https://download.eclipse.org/tools/cdt/builds/10.4/cdt-10.4.0-m3/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.swtbot.eclipse.feature.group" version="0.0.0"/>

releng/org.eclipse.tracecompass.target/tracecompass-eStaging.target

@@ -1,9 +1,9 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?><?pde version="3.8"?><target name="tracecompass-eStaging" sequenceNumber="169">
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><?pde version="3.8"?><target name="tracecompass-eStaging" sequenceNumber="170">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.cdt.gnu.dsf.feature.group" version="0.0.0"/>
 <unit id="org.eclipse.tm.terminal.control" version="0.0.0"/>
-<repository location="https://download.eclipse.org/tools/cdt/builds/10.4/cdt-10.4.0-m1a/"/>
+<repository location="https://download.eclipse.org/tools/cdt/builds/10.4/cdt-10.4.0-m3/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.swtbot.eclipse.feature.group" version="0.0.0"/>