Remove our fork of forkjoin. Java 8 bundles it.

Provide deprecated compatibility stubs for the types and static members,
which forward as follows:

```
scala.concurrent.forkjoin.ForkJoinPool         => java.util.concurrent.ForkJoinPool
scala.concurrent.forkjoin.ForkJoinTask         => java.util.concurrent.ForkJoinTask
scala.concurrent.forkjoin.ForkJoinWorkerThread => java.util.concurrent.ForkJoinWorkerThread
scala.concurrent.forkjoin.LinkedTransferQueue  => java.util.concurrent.LinkedTransferQueue
scala.concurrent.forkjoin.RecursiveAction      => java.util.concurrent.RecursiveAction
scala.concurrent.forkjoin.RecursiveTask        => java.util.concurrent.RecursiveTask
scala.concurrent.forkjoin.ThreadLocalRandom    => java.util.concurrent.ThreadLocalRandom
```

To prepare for Java 9, the Scala library does not itself use `sun.misc.Unsafe`.
However, for now, it provide a convenience accessor for it
via `scala.concurrent.util.Unsafe`. This (deprecated) class will
be removed as soon as the eco-system drops its use
(akka-actor, I'm looking at you).

1 files changed, 3 insertions, 4 deletions

diff --git a/test/files/jvm/t7146.check b/test/files/jvm/t7146.check
index 7c76040205..b2c6e444f7 100644
--- a/test/files/jvm/t7146.check
+++ b/test/files/jvm/t7146.check
@@ -1,5 +1,4 @@
-should be scala.concurrent.impl.ExecutionContextImpl == true
-should be scala.concurrent.forkjoin.ForkJoinPool == true
+ExecutionContext.global is a scala.concurrent.impl.ExecutionContextImpl.
 should have non-null UncaughtExceptionHandler == true
-should be a scala.concurrent.impl.ExecutionContextImpl UncaughtExceptionHandler == true
-should just print out on uncaught == true
+ExecutionContext.global.executor.getUncaughtExceptionHandler is a scala.concurrent.impl.ExecutionContextImpl.
+should just print out on uncaught: true