Merge pull request scala#2943 from som-snytt/issue/7839-phase-ass-chkinit

SI-7839 Final val breaks checkinit build

Author: gkossakowski

src/compiler/scala/tools/nsc/Global.scala

@@ -629,7 +629,7 @@ class Global(var currentSettings: Settings, var reporter: Reporter)
   object terminal extends {
     val global: Global.this.type = Global.this
   } with SubComponent {
-    final val phaseName = "terminal"
+    val phaseName = "terminal"
     val runsAfter = List("jvm")
     val runsRightAfter = None
     override val terminal = true