encoding_test fixtures and license script

tools/licenses/lib/paths.dart

@@ -102,7 +102,9 @@ final Set<String> skippedPaths = <String>{
   r'flutter/third_party/inja/third_party/amalgamate', // only used at build time
   r'flutter/third_party/inja/third_party/include/doctest', // seems to be a unit test library
   r'flutter/third_party/json/docs',
+  r'flutter/third_party/libpng/ci', // not linked in
   r'flutter/third_party/libpng/contrib', // not linked in
+  r'flutter/third_party/libpng/loongarch', // not linked in
   r'flutter/third_party/libpng/mips', // not linked in
   r'flutter/third_party/libpng/powerpc', // not linked in
   r'flutter/third_party/libpng/projects', // not linked in

tools/licenses/lib/patterns.dart

@@ -49,8 +49,8 @@ final RegExp copyrightMentionOkPattern = RegExp(
      r'|// The copyright below was added in 2009, but I see no record'
      r'|This ICU code derived from:'
      r'|the contents of which are also included in zip.h' // seen in minizip's unzip.c, but the upshot of the crazy license situation there is that we don't have to do anything
-     r'|" inflate 1\.2\.1\d Copyright 1995-2022 Mark Adler ";'
-     r'|" deflate 1\.2\.1\d Copyright 1995-2022 Jean-loup Gailly and Mark Adler ";'
+     r'|" inflate 1\.3\.0\.\d Copyright 1995-2023 Mark Adler ";'
+     r'|" deflate 1\.3\.0\.\d Copyright 1995-2023 Jean-loup Gailly and Mark Adler ";'
      r'|const char zip_copyright\[\] =" zip 1\.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";'
      r'|#define JCOPYRIGHT_SHORT "Copyright \(C\) 1991-2016 The libjpeg-turbo Project and many others"'
      r"|r'[^']*©[^']*'" // e.g. flutter/third_party/web_locale_keymap/lib/web_locale_keymap/key_mappings.g.dart