Move blackBoxFile() testData to box/ directory

Delete all test methods (and empty test classes), since they'll be
auto-generated

compiler/testData/codegen/box/namespace/checkCast.kt

@@ -0,0 +1,15 @@
+class C(val x: Int) {
+  fun equals(rhs: Any?): Boolean {
+    if (rhs is C) {
+      val rhsC = rhs as C
+      return rhsC.x == x
+    }
+    return false
+  }
+}
+
+fun box(): String {
+  val c1 = C(10)
+  val c2 = C(10)
+  return if (c1 == c2) "OK" else "fail"
+}

compiler/testData/codegen/box/namespace/incrementProperty.kt

@@ -0,0 +1,14 @@
+class Slot() {
+  var vitality: Int = 10000
+
+  fun increaseVitality(delta: Int) {
+    vitality += delta
+    if (vitality > 65535) vitality = 65535;
+  }
+}
+
+fun box(): String {
+  val s = Slot()
+  s.increaseVitality(1000)
+  return if (s.vitality == 11000) "OK" else "fail"
+}

compiler/testData/codegen/box/namespace/invokespecial.kt

@@ -0,0 +1,45 @@
+// KT-2202 Wrong instruction for invoke private setter
+
+class A {
+    private fun f1() { }
+    fun foo() {
+        f1()
+    }
+}
+
+class B {
+    private val foo = 1
+        get
+
+    fun foo() {
+        foo
+    }
+}
+
+class C {
+    private var foo = 1
+        get
+        set
+
+    fun foo() {
+        foo = 2
+        foo
+    }
+}
+
+class D {
+    var foo = 1
+        private set
+
+    fun foo() {
+        foo = 2
+    }
+}
+
+fun box(): String {
+   A().foo()
+   B().foo()
+   C().foo()
+   D().foo()
+   return "OK"
+}

compiler/testData/codegen/box/namespace/namespaceQualifiedMethod.kt

@@ -0,0 +1,6 @@
+package Foo
+  fun bar() = 610
+
+fun box(): String {
+  return if (Foo.bar() == 610) "OK" else "fail"
+}

compiler/testData/codegen/box/namespace/privateTopLevelPropAndVarInInner.kt

@@ -0,0 +1,4 @@
+private var x = "O"
+private fun f() = "K"
+
+fun box() = { x + f() }()