Merged tests with inline functions in class and in package.

Now this test also checks situation when several class files with inline functions are emitted from one source file.

jps-plugin/testData/incremental/inlineFunctionsUnchanged/usage.kt

@@ -0,0 +1,6 @@
+package usage
+
+fun main(args: Array<String>) {
+    inline.f { println("to be inlined") }
+    inline.Klass().f { println("to be inlined") }
+}