JVM IR: sort multifile part names in metadata

compiler/testData/codegen/box/multifileClasses/optimized/namesInMetadataAreSorted.kt

@@ -0,0 +1,31 @@
+// TARGET_BACKEND: JVM
+// IGNORE_LIGHT_ANALYSIS
+// WITH_RUNTIME
+// !INHERIT_MULTIFILE_PARTS
+// FILE: ccc.kt
+
+@file:JvmName("Facade")
+@file:JvmMultifileClass
+package test
+fun ccc() {}
+
+// FILE: aaa.kt
+
+@file:JvmName("Facade")
+@file:JvmMultifileClass
+package test
+fun aaa() {}
+
+// FILE: _b.kt
+
+@file:JvmName("Facade")
+@file:JvmMultifileClass
+package test
+fun b() {}
+
+// FILE: test.kt
+
+fun box(): String {
+    val names = Class.forName("test.Facade").getAnnotation(Metadata::class.java).data1.toList()
+    return if (names == listOf("test/Facade__AaaKt", "test/Facade__CccKt", "test/Facade___bKt")) "OK" else "Fail: $names"
+}