Also compile Function1/Function2 in stdlib.

It seems these work now that we have the special treatment of annotations.
Let's see what the CI says.

Author: odersky

compiler/src/dotty/tools/dotc/typer/FrontEnd.scala

@@ -84,7 +84,6 @@ class FrontEnd extends Phase {
     }
     unitContexts foreach (parse(_))
     record("parsedTrees", ast.Trees.ntrees)
-    unitContexts.foreach(ctx => println(ctx.compilationUnit))
     remaining = unitContexts
     while (remaining.nonEmpty) {
       enterSyms(remaining.head)

compiler/test/dotc/scala-collections.blacklist

@@ -1,10 +1,3 @@
-## Errors having to do with bootstrap
-
-../scala-scala/src/library/scala/Function1.scala
-../scala-scala/src/library/scala/Function2.scala
-# Cyclic reference because of @specialized annotation
-
-
 ## Errors having to do with deep subtypes
 
 ../scala-scala/src/library/scala/collection/generic/ParSetFactory.scala

compiler/test/dotc/scala-collections.whitelist

@@ -581,8 +581,8 @@
 
 ../scala-scala/src/library/scala/Function.scala
 ../scala-scala/src/library/scala/Function0.scala
-#../scala-scala/src/library/scala/Function1.scala
-#../scala-scala/src/library/scala/Function2.scala
+../scala-scala/src/library/scala/Function1.scala
+../scala-scala/src/library/scala/Function2.scala
 ../scala-scala/src/library/scala/Function3.scala
 ../scala-scala/src/library/scala/Function4.scala
 ../scala-scala/src/library/scala/Function5.scala