[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/function/arithmetic.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+fun square(a:Int):Int = a * a
+fun sumOfSquares(a:Int, b:Int):Int = square(a) + square(b)
+fun diffOfSquares(a:Int, b:Int):Int = square(a) - square(b)
+fun mod(a:Int,b:Int):Int = a / b
+fun remainder(a:Int, b:Int):Int = a % b
+
+fun box(): String {
+    if (square(2)             != 4)   throw Error()
+    if (sumOfSquares(2, 4)    != 20)  throw Error()
+    if (diffOfSquares(2, 4)   != -12) throw Error()
+    if (mod(5, 2)             != 2)   throw Error()
+    if (remainder(5, 2)       != 1)   throw Error()
+
+    return "OK"
+}