Treat SEALED_SUBCLASS_FQ_NAME_LIST change as a class signature change

#KT-19580

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/Base.kt

@@ -0,0 +1,3 @@
+sealed class Base
+sealed class Intermediate : Base()
+class Impl1 : Intermediate()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/Base.kt.new.1

@@ -0,0 +1,4 @@
+sealed class Base
+sealed class Intermediate : Base()
+class Impl1 : Intermediate()
+class Impl2 : Intermediate()

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/build.log

@@ -0,0 +1,40 @@
+================ Step #1 =================
+
+Cleaning output files:
+  out/production/module/Base.class
+  out/production/module/Impl1.class
+  out/production/module/Intermediate.class
+End of files
+Compiling files:
+  src/Base.kt
+End of files
+Marked as dirty by Kotlin:
+  src/use.kt
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Cleaning output files:
+  out/production/module/META-INF/module.kotlin_module
+  out/production/module/UseKt.class
+End of files
+Compiling files:
+  src/use.kt
+End of files
+Exit code: ABORT
+------------------------------------------
+COMPILATION FAILED
+'when' expression must be exhaustive, add necessary 'is Impl2' branch or 'else' branch instead
+
+================ Step #2 =================
+
+Cleaning output files:
+  out/production/module/Base.class
+  out/production/module/Impl1.class
+  out/production/module/Impl2.class
+  out/production/module/Intermediate.class
+End of files
+Compiling files:
+  src/Base.kt
+  src/use.kt
+End of files
+Exit code: OK
+------------------------------------------

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/use.kt

@@ -0,0 +1,4 @@
+fun use(x: Base): Int =
+        when (x) {
+            is Impl1 -> 1
+        }

jps-plugin/testData/incremental/classHierarchyAffected/sealedClassIndirectImplAdded/use.kt.new.2

@@ -0,0 +1,5 @@
+fun use(x: Base): Int =
+        when (x) {
+            is Impl1 -> 1
+            is Impl2 -> 2
+        }