Test framework for inline

compiler/testData/codegen/boxInline/vararg/1.kt

@@ -0,0 +1,12 @@
+import test.*
+
+fun test1(): String {
+    return doSmth("O", "K")
+}
+
+fun box(): String {
+    val result = test1()
+    if (result != "OK") return "fail1: ${result}"
+
+    return "OK"
+}

compiler/testData/codegen/boxInline/vararg/2.kt

@@ -0,0 +1,5 @@
+package test
+
+inline fun doSmth(vararg a: String) : String {
+    return a.foldRight("", {(a, b) -> a + b})
+}