Added tests with SAM adapters in "invoke" convention.

compiler/testData/codegen/boxWithJava/samAdapters/operators/invoke.kt

@@ -0,0 +1,8 @@
+fun box(): String {
+    val obj = JavaClass()
+
+    var v = "FAIL"
+    obj({ v = "O" })
+    obj { v += "K" }
+    return v
+}