Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/controlStructures/continueInExpr.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+
+fun concatNonNulls(strings: List<String?>): String {
+    var result = ""
+    for (str in strings) {
+        result += str?:continue
+    }
+    return result
+}
+
+fun box(): String {
+    val test = concatNonNulls(listOf("abc", null, null, "", null, "def"))
+    if (test != "abcdef") return "Failed: test=$test"
+
+    return "OK"
+}

compiler/testData/codegen/box/controlStructures/kt2423.kt

@@ -0,0 +1,51 @@
+// WITH_RUNTIME
+// FULL_JDK
+
+import java.util.LinkedList
+
+fun ok1(): Boolean {
+    val queue = LinkedList(listOf(1, 2, 3))
+    while (!queue.isEmpty()) {
+        queue.poll()
+        for (y in 1..3) {
+            if (queue.contains(y)) {
+                return true
+            }
+        }
+    }
+    return false
+}
+
+fun ok2(): Boolean {
+    val queue = LinkedList(listOf(1, 2, 3))
+    val array = arrayOf(1, 2, 3)
+    while (!queue.isEmpty()) {
+        queue.poll()
+        for (y in array) {
+            if (queue.contains(y)) {
+                return true
+            }
+        }
+    }
+    return false
+}
+
+fun ok3(): Boolean {
+    val queue = LinkedList(listOf(1, 2, 3))
+    while (!queue.isEmpty()) {
+        queue.poll()
+        var x = 0
+        do {
+            x++
+            if (x == 2) return true
+        } while (x < 2)
+    }
+    return false
+}
+
+fun box(): String {
+    if (!ok1()) return "Fail #1"
+    if (!ok2()) return "Fail #2"
+    if (!ok3()) return "Fail #3"
+    return "OK"
+}