Make ICReporter interface

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunner.kt

@@ -66,7 +66,7 @@ fun makeIncrementally(
     }
 }
 
-private object EmptyICReporter : ICReporter() {
+private object EmptyICReporter : ICReporter {
     override fun report(message: ()->String) {
     }
 }

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/KotlinStandaloneIncrementalCompilationTest.kt

@@ -124,7 +124,7 @@ class KotlinStandaloneIncrementalCompilationTest : TestWithWorkingDir() {
         val compiledSources = arrayListOf<File>()
         var resultExitCode = ExitCode.OK
 
-        val reporter = object : ICReporter() {
+        val reporter = object : ICReporter {
             override fun report(message: ()->String) {
             }