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/reflection/functions/javaMethodsSmokeTest.kt

@@ -0,0 +1,50 @@
+// TARGET_BACKEND: JVM
+
+// WITH_REFLECT
+// FILE: J.java
+
+import java.util.List;
+
+public class J {
+    void simple() {}
+
+    void objectTypes(
+            Object o, String s, Object[] oo, String[] ss
+    ) {}
+
+    void primitives(
+            boolean z, char c, byte b, short s, int i, float f, long j, double d
+    ) {}
+
+    void primitiveArrays(
+            boolean[] z, char[] c, byte[] b, short[] s, int[] i, float[] f, long[] j, double[] d
+    ) {}
+
+    void multiDimensionalArrays(
+            int[][][] i, Cloneable[][][][] c
+    ) {}
+
+    void wildcards(
+            List<? extends Number> l, List<? super Cloneable> m
+    ) {}
+}
+
+// FILE: K.kt
+
+import kotlin.reflect.KFunction
+
+// Initiate descriptor computation in reflection to ensure that nothing fails
+fun test(f: KFunction<*>) {
+    f.parameters
+}
+
+fun box(): String {
+    test(J::simple)
+    test(J::objectTypes)
+    test(J::primitives)
+    test(J::primitiveArrays)
+    test(J::multiDimensionalArrays)
+    test(J::wildcards)
+
+    return "OK"
+}