[build] sped up the build considerable.

We used to use the mango SPI processor, but this had two major issues:
* ecj wouldn't run annotation processors, requiring a separate proc:only compile run with javac
* mangoSPI couldn't do incremental compilation, so this required a full rebuild just to generate SPI files, every time.

Addressed by updating to IPP40 which does support explicit annotation processors even for ecj, and
adding our own SPI generating annotation processor to the build which can deal with incrementals.

There are some limits; removing a `@Provides` annotation on an existing type will need a full clean to pick that up, for example.
These limits seem quite exotic, though.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/core/lombok/javac/handlers/HandleUtilityClass.java b/src/core/lombok/javac/handlers/HandleUtilityClass.java
index b400098b..cb8a72ad 100644
--- a/src/core/lombok/javac/handlers/HandleUtilityClass.java
+++ b/src/core/lombok/javac/handlers/HandleUtilityClass.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2015-2020 The Project Lombok Authors.
+ * Copyright (C) 2015-2021 The Project Lombok Authors.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -25,8 +25,6 @@ import static lombok.core.handlers.HandlerUtil.handleExperimentalFlagUsage;
 import static lombok.javac.Javac.CTC_VOID;
 import static lombok.javac.handlers.JavacHandlerUtil.*;
 
-import org.mangosdk.spi.ProviderFor;
-
 import com.sun.tools.javac.code.Flags;
 import com.sun.tools.javac.code.Type;
 import com.sun.tools.javac.tree.JCTree.JCAnnotation;
@@ -50,12 +48,13 @@ import lombok.javac.Javac;
 import lombok.javac.JavacAnnotationHandler;
 import lombok.javac.JavacNode;
 import lombok.javac.JavacTreeMaker;
+import lombok.spi.Provides;
 
 /**
  * Handles the {@code @UtilityClass} annotation for javac.
  */
 @HandlerPriority(-4096) //-2^12; to ensure @FieldDefaults picks up on the 'static' we set here.
-@ProviderFor(JavacAnnotationHandler.class)
+@Provides
 public class HandleUtilityClass extends JavacAnnotationHandler<UtilityClass> {
 	@Override public void handle(AnnotationValues<UtilityClass> annotation, JCAnnotation ast, JavacNode annotationNode) {
 		handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.UTILITY_CLASS_FLAG_USAGE, "@UtilityClass");