Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/regressions/kt864.kt

@@ -0,0 +1,23 @@
+// WITH_RUNTIME
+// FULL_JDK
+
+import java.io.*
+import java.util.*
+
+fun sample() : Reader {
+    return StringReader("""Hello
+World""");
+  }
+
+  fun box() : String {
+    // NOTE: Also tested in stdlib: LineIteratorTest.useLines
+
+    // TODO compiler error
+    // both these expressions causes java.lang.NoClassDefFoundError: collections/CollectionPackage
+    val list1 = sample().useLines { it.toList() }
+    val list2 = sample().useLines<ArrayList<String>>{ it.toCollection(arrayListOf()) }
+
+    if(arrayListOf("Hello", "World") != list1) return "fail"
+    if(arrayListOf("Hello", "World") != list2) return "fail"
+    return "OK"
+  }