[KLIB][tests] Keep "klib evolution" test data under "testData/klib/" dir

compiler/testData/klib/evolution/addParameterDefaulValue.kt

@@ -0,0 +1,32 @@
+// MODULE: lib
+// FILE: A.kt
+// VERSION: 1
+
+fun foo(param: String) = "foo before change $param"
+
+class X(val constructorParam: String) {
+    fun bar(param: String) = "bar before change $param and $constructorParam"
+}
+
+// FILE: A.kt
+// VERSION: 2
+
+fun foo(param: String = "none") = "foo after change $param"
+
+class X(val constructorParam: String = "none") {
+    fun bar(param: String = "none") = "bar after change $param and $constructorParam"
+}
+
+
+// MODULE: mainLib(lib)
+// FILE: mainLib.kt
+fun lib(): String = when {
+    foo("global") != "foo after change global" -> "fail 1"
+    X("constructor").bar("member") != "bar after change member and constructor" -> "fail 2"
+    else -> "OK"
+}
+
+// MODULE: main(mainLib)
+// FILE: main.kt
+fun box(): String = lib()
+