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

compiler/testData/klib/evolution/newFakeOverride.kt

@@ -0,0 +1,42 @@
+// MODULE: base
+// FILE: A.kt
+// VERSION: 1
+
+open class X 
+
+// FILE: B.kt
+// VERSION: 2
+
+open class X {
+    open fun foo(): String = "new member"
+}
+
+// MODULE: child(base)
+// FILE: C.kt
+
+class Y: X()
+
+// MODULE: lib(child)
+// FILE: D.kt
+// VERSION: 1
+
+fun qux(): String = "no foo() exists in ${Y()}"
+
+// FILE: E.kt
+// VERSION: 2
+
+fun qux(): String = Y().foo()
+
+// MODULE: mainLib(lib)
+// FILE: mainLib.kt
+
+fun lib(): String = when {
+    qux() != "new member" -> "fail 1"
+
+    else -> "OK"
+}
+
+// MODULE: main(mainLib)
+// FILE: main.kt
+fun box(): String = lib()
+