kotlin-test: Make 'todo { }' function common

libraries/kotlin.test/common/src/main/kotlin/kotlin/test/AssertionsH.kt

@@ -0,0 +1,7 @@
+package kotlin.test
+
+/**
+ * Comments out a block of test code until it is implemented while keeping a link to the code
+ * to implement in your unit test output
+ */
+header fun todo(block: () -> Unit)

libraries/kotlin.test/js/src/main/kotlin/JsImpl.kt

@@ -20,7 +20,7 @@ package kotlin.test
  * Comments out a block of test code until it is implemented while keeping a link to the code
  * to implement in your unit test output
  */
-fun todo(block: () -> Any) {
+impl fun todo(block: () -> Unit) {
     // println("TODO at " + (Exception() as java.lang.Throwable).getStackTrace()?.get(1) + " for " + block)
     println("TODO at " + block)
 }

libraries/kotlin.test/jvm/src/main/kotlin/AssertionsImpl.kt

@@ -60,7 +60,7 @@ inline fun <reified T : Throwable> assertFailsWith(message: String? = null, noin
  * to implement in your unit test output
  */
 @InlineOnly
-inline fun todo(@Suppress("UNUSED_PARAMETER") block: () -> Unit) {
+impl inline fun todo(@Suppress("UNUSED_PARAMETER") block: () -> Unit) {
     System.out.println("TODO at " + currentStackTrace()[0])
 }