Several bundles changed and need to be touched
Bug 418646 - org.eclipse.jdt.core does not provide an artifact with classifier 'antadapter'
Bug 436266 - Use RC3 (plus) version of JDT compiler to build RC4
Bug 551547 - The library org.eclipse.jdt.core.compiler.batch_*.jar should be signed
Bug 549687 - Local ecj build has a SHA-256 digest error for org/eclipse/jdt/internal/compiler/apt/model/PackageElementImpl.class
Bug 566471 - I20200828-0150 - Comparator Errors Found
Bug 573283 - don't include javax15api.jar in jdt binaries