Moved current incremental compiler test data into subdirectory.

Tweaked test generator to avoid creating test methods for parent directory of tests.

jps-plugin/testData/incremental/pureKotlin/topLevelMembersInTwoFiles/b.kt

@@ -0,0 +1,24 @@
+package test
+
+fun bar(i: Int): String {
+    simpleVar = ":) " + simpleVar
+
+    return "$i   ${quux()}   $i"
+}
+
+fun quux(): String {
+    return "quux"
+}
+
+var simpleVar = prop1
+
+var fieldlessVar: String
+    get() = ""
+    set(value) {}
+
+deprecated("")
+val fieldlessValWithAnnotation: String
+    get() = ""
+
+var delegated: String by kotlin.properties.Delegates.notNull()
+