Incremental compilation support for multifile classes.

Original commit: 3dfe9951ef

jps/jps-plugin/testData/incremental/pureKotlin/multifileClassInlineFunction/inlineOther.kt

@@ -0,0 +1,7 @@
+@file:[JvmName("Test") JvmMultifileClass]
+package other
+
+inline fun f(body: () -> Unit) {
+    println("i'm other inline function")
+    body()
+}