Create descriptors with Kotlin package name in decompiler/cls stub builder

(cherry picked from commit b2620d1)

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/classFile/DeserializerForClassfileDecompiler.kt

@@ -89,7 +89,7 @@ class DeserializerForClassfileDecompiler(
         }
         val (nameResolver, packageProto) = JvmProtoBufUtil.readPackageDataFrom(annotationData, strings)
         val membersScope = DeserializedPackageMemberScope(
-                createDummyPackageFragment(packageFqName), packageProto, nameResolver,
+                createDummyPackageFragment(header.packageName?.let(::FqName) ?: facadeFqName.parent()), packageProto, nameResolver,
                 JvmPackagePartSource(binaryClassForPackageClass), deserializationComponents
         ) { emptyList() }
         return membersScope.getContributedDescriptors().toList()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/classFile/KotlinClsStubBuilder.kt

@@ -86,7 +86,9 @@ open class KotlinClsStubBuilder : ClsStubBuilder() {
             KotlinClassHeader.Kind.FILE_FACADE -> {
                 val (nameResolver, packageProto) = JvmProtoBufUtil.readPackageDataFrom(annotationData, strings)
                 val context = components.createContext(nameResolver, packageFqName, TypeTable(packageProto.typeTable))
-                createFileFacadeStub(packageProto, classId.asSingleFqName(), context)
+                val fqName = header.packageName?.let { ClassId(FqName(it), classId.relativeClassName, classId.isLocal).asSingleFqName() }
+                             ?: classId.asSingleFqName()
+                createFileFacadeStub(packageProto, fqName, context)
             }
             else -> throw IllegalStateException("Should have processed " + file.path + " with header $header")
         }