Fix incremental recompilation of JvmMultifileClass with top level function

See 53b584f and previous changes where this behavior was broken (this was
untested, however). Fixes EA-90065

jps-plugin/testData/incremental/pureKotlin/multifileClassAddTopLevelFunWithDefault/a.kt

@@ -0,0 +1,4 @@
+@file:[JvmName("Test") JvmMultifileClass]
+package test
+
+fun a() = "a"

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

@@ -0,0 +1,4 @@
+@file:[JvmName("Test") JvmMultifileClass]
+package test
+
+fun b() = ""

jps-plugin/testData/incremental/pureKotlin/multifileClassAddTopLevelFunWithDefault/b.kt.new

@@ -0,0 +1,5 @@
+@file:[JvmName("Test") JvmMultifileClass]
+package test
+
+fun b() = ""
+fun b(s: String = "") = s

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

@@ -0,0 +1,24 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/test/Test.class
+  out/production/module/test/Test__BKt.class
+End of files
+Compiling files:
+  src/b.kt
+End of files
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/test/Test.class
+  out/production/module/test/Test__AKt.class
+  out/production/module/usage/UsageKt.class
+End of files
+Compiling files:
+  src/a.kt
+  src/usage.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/pureKotlin/multifileClassAddTopLevelFunWithDefault/experimental-ic-build.log

@@ -0,0 +1,26 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/test/Test.class
+  out/production/module/test/Test__BKt.class
+End of files
+Compiling files:
+  src/b.kt
+End of files
+Marked as dirty by Kotlin:
+  src/usage.kt
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/test/Test.class
+  out/production/module/test/Test__AKt.class
+  out/production/module/usage/UsageKt.class
+End of files
+Compiling files:
+  src/a.kt
+  src/usage.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/pureKotlin/multifileClassAddTopLevelFunWithDefault/usage.kt

@@ -0,0 +1,8 @@
+package usage
+
+import test.*
+
+fun usage() {
+    a()
+    b()
+}