Reorganized SAM-related test data.

compiler/testData/codegen/boxWithJava/sam/adapters/callAbstractAdapter.kt

@@ -0,0 +1,11 @@
+class Impl: JavaInterface {
+    override fun run(r: Runnable?) {
+        r?.run()
+    }
+}
+
+fun box(): String {
+    var v = "FAIL"
+    Impl().run { v = "OK" }
+    return v
+}