backend/tests: Add blackbox tests from Kotlin JVM

Added tests from testData/codegen/box directory. There are blackbox tests
in other directories and they are to be added.

backend.native/tests/external/codegen/blackbox/controlStructures/breakInFinally.kt

@@ -0,0 +1,11 @@
+fun box(): String {
+    while (true) {
+        try {
+            continue;
+        }
+        finally {
+            break;
+        }
+    }
+    return "OK"
+}