Fix: not loading ancestor packages from incremental cache.

jps-plugin/testData/incremental/pureKotlin/subpackage/build.log

@@ -0,0 +1,8 @@
+Cleaning output files:
+out/production/module/outer/nested/NestedPackage$main$1.class
+out/production/module/outer/nested/NestedPackage-nested-*.class
+out/production/module/outer/nested/NestedPackage.class
+End of files
+Compiling files:
+src/nested.kt
+End of files

jps-plugin/testData/incremental/pureKotlin/subpackage/nested.kt

@@ -0,0 +1,12 @@
+package outer.nested
+
+import outer.f
+
+fun g() {
+}
+
+fun main(args: Array<String>) {
+    f { }
+    g()
+}
+

jps-plugin/testData/incremental/pureKotlin/subpackage/nested.kt.new

@@ -0,0 +1,12 @@
+package outer.nested
+
+import outer.f
+
+fun g() {
+}
+
+fun main(args: Array<String>) {
+    f { }
+    g()
+}
+

jps-plugin/testData/incremental/pureKotlin/subpackage/outer.kt

@@ -0,0 +1,7 @@
+package outer
+
+fun f(c: () -> Unit) {
+}
+
+fun <T> f(c: () -> T): String = ""
+