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/arrays/forEachBooleanArray.kt

@@ -0,0 +1,6 @@
+fun box(): String {
+    for (x in BooleanArray(5)) {
+        if (x != false) return "Fail $x"
+    }
+    return "OK"
+}