Rename built-in metadata files starting with dot

Files starting with dot are considered as hidden on Unix systems, and sometimes
are ignored by the tools. For example, Android build tools do not package such
files to the resulting application, which causes Kotlin reflection to fail
there

 #KT-7088 Fixed

compiler/builtins-serializer/src/org/jetbrains/kotlin/serialization/builtins/BuiltInsSerializer.kt

@@ -128,20 +128,25 @@ public class BuiltInsSerializer(private val dependOnOldBuiltIns: Boolean) {
         val fragments = module.getPackageFragmentProvider().getPackageFragments(fqName)
         val packageProto = serializer.packageProto(fragments).build() ?: error("Package fragments not serialized: $fragments")
         packageProto.writeTo(packageStream)
-        write(destDir, BuiltInsSerializationUtil.getPackageFilePath(fqName), packageStream)
+        write(destDir, BuiltInsSerializationUtil.getPackageFilePath(fqName), packageStream,
+              BuiltInsSerializationUtil.FallbackPaths.getPackageFilePath(fqName))
 
         val nameStream = ByteArrayOutputStream()
         val strings = serializer.getStringTable()
         SerializationUtil.serializeStringTable(nameStream, strings.serializeSimpleNames(), strings.serializeQualifiedNames())
-        write(destDir, BuiltInsSerializationUtil.getStringTableFilePath(fqName), nameStream)
+        write(destDir, BuiltInsSerializationUtil.getStringTableFilePath(fqName), nameStream,
+              BuiltInsSerializationUtil.FallbackPaths.getStringTableFilePath(fqName))
     }
 
-    private fun write(destDir: File, fileName: String, stream: ByteArrayOutputStream) {
+    internal /* KT-5786 */ fun write(destDir: File, fileName: String, stream: ByteArrayOutputStream, legacyFileName: String? = null) {
         totalSize += stream.size()
         totalFiles++
-        val file = File(destDir, fileName)
-        file.getParentFile()?.mkdirs()
-        file.writeBytes(stream.toByteArray())
+        File(destDir, fileName).getParentFile().mkdirs()
+        File(destDir, fileName).writeBytes(stream.toByteArray())
+
+        legacyFileName?.let { fileName ->
+            File(destDir, fileName).writeBytes(stream.toByteArray())
+        }
     }
 
     private fun serializeClass(

compiler/builtins-serializer/src/org/jetbrains/kotlin/serialization/builtins/run.kt

@@ -29,7 +29,7 @@ Usage: ... <destination dir> (<source dir>)+
 
 Analyzes Kotlin sources found in the given source directories and serializes
 found top-level declarations to <destination dir> (files such as
-.kotlin_string_table, .kotlin_package, *.kotlin_class)"""
+*.kotlin_string_table, *.kotlin_package, *.kotlin_class)"""
         )
         return
     }