Always inject input tasks

I had tried to be cute and only inject certain tasks if they're actually
used, but that made it so that dynamic tasks may not have be able to use
them.

main/src/main/scala/sbt/nio/Settings.scala

@@ -142,8 +142,6 @@ private[sbt] object Settings {
       case dynamicDependency.key => (dynamicDependency in scopedKey.scope := { () }) :: Nil
       case transitiveClasspathDependency.key =>
         (transitiveClasspathDependency in scopedKey.scope := { () }) :: Nil
-      case allInputFiles.key     => allFilesImpl(scopedKey) :: Nil
-      case changedInputFiles.key => changedInputFilesImpl(scopedKey)
       case changedOutputFiles.key =>
         changedFilesImpl(scopedKey, changedOutputFiles, outputFileStamps)
       case pathToFileStamp.key => stamper(scopedKey) :: Nil
@@ -206,7 +204,8 @@ private[sbt] object Settings {
       }
       dynamicInputs.foreach(_ ++= inputs.map(g => DynamicInput(g, stamper, forceTrigger)))
       view.list(inputs)
-    }) :: fileStamps(scopedKey) :: allFilesImpl(scopedKey) :: Nil
+    }) :: fileStamps(scopedKey) :: allFilesImpl(scopedKey) :: Nil ++
+      changedInputFilesImpl(scopedKey)
   }
 
   private[this] val taskClass = classOf[Task[_]]