[releng] Update cdt.target to point to new dependency versions

Other dependencies, such as platform may be updated later in the
dev cycle to increase CDT's minimum dependency version to the 2021-06
or even later releases.

Change-Id: Ib6386dca74f9e1327f2f7beae0adf13f54e668f3

releng/CDT.setup

@@ -333,7 +333,7 @@
           <repository
               url="https://download.eclipse.org/tm4e/releases/0.4.1/"/>
           <repository
-              url="https://download.eclipse.org/tools/cdt/releases/10.2/cdt-10.2.0/">
+              url="https://download.eclipse.org/tools/cdt/releases/10.3/cdt-10.3.0/">
             <annotation>
               <detail
                   key="description">

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="cdt" sequenceNumber="104">
+<target name="cdt" sequenceNumber="105">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.license.feature.group" version="0.0.0"/>
@@ -47,7 +47,7 @@
 <repository location="https://download.eclipse.org/tm4e/releases/0.4.1/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<repository location="https://download.eclipse.org/tools/cdt/releases/10.2/cdt-10.2.0/"/>
+<repository location="https://download.eclipse.org/tools/cdt/releases/10.3/cdt-10.3.0/"/>
 <!-- We explicitly have CDT in target platform so that developers can develop org.eclipse.cdt.core/ui without requiring all the projects from CDT in their workspace. -->
 	<unit id="org.eclipse.cdt.feature.group" version="0.0.0"/>
 </location>