Added tests for stdlib Array constructors

compiler/testData/codegen/boxWithStdlib/arrays/arrayConstructorsSimple.kt

@@ -0,0 +1,25 @@
+import kotlin.test.assertEquals
+
+fun simpleIntArray(): Array<Int> = Array(3) { it }
+fun simpleDoubleArray(): Array<Double> = Array(3) { it.toDouble() + 0.1 }
+fun simpleStringArray(): Array<String> = Array(3) { it.toString() }
+
+fun box(): String {
+    val ia = simpleIntArray()
+    assertEquals(0, ia[0])
+    assertEquals(1, ia[1])
+    assertEquals(2, ia[2])
+
+    val da = simpleDoubleArray()
+    assertEquals(0.1, da[0])
+    assertEquals(1.1, da[1])
+    assertEquals(2.1, da[2])
+
+    val sa = simpleStringArray()
+    assertEquals("0", sa[0])
+    assertEquals("1", sa[1])
+    assertEquals("2", sa[2])
+
+    return "OK"
+}
+

compiler/testData/codegen/boxWithStdlib/arrays/multiArrayConstructors.kt

@@ -0,0 +1,29 @@
+import kotlin.test.assertEquals
+
+fun stringMultiArray(): Array<Array<String>> = Array(3) {
+    i -> Array(3) { j -> "$i-$j" }
+}
+
+fun stringNullableMultiArray(): Array<Array<String?>> = Array(3) {
+    i -> if (i == 1) Array(3) { j -> "$i-$j" } as Array<String?> else arrayOfNulls<String>(3)
+}
+
+fun box(): String {
+    val matrix = stringMultiArray()
+
+    for (i in 0..2) {
+        for (j in 0..2) {
+            assertEquals("$i-$j", matrix[i][j], "matrix")
+        }
+    }
+
+    val matrixNullable = stringNullableMultiArray()
+
+    for (j in 0..2) {
+        assertEquals(null, matrixNullable[0][j], "nullable")
+        assertEquals("1-$j", matrixNullable[1][j], "nullable")
+        assertEquals(null, matrixNullable[2][j], "nullable")
+    }
+
+    return "OK"
+}