[gimp] build: add new Lithuanian translation to the Windows installer.

[Jehan <jehanp src gnome org>]

commit 3b3f5c856247b1a5cbd989449e0206d7da180b64
Author: Jehan <jehan girinstud io>
Date:   Sat Sep 4 00:53:00 2021 +0200

    build: add new Lithuanian translation to the Windows installer.
    
    This new unit test (test-installer-langs.sh) is great, showing us
    inconsistencies between files!

 build/windows/installer/gimp3264.iss     | 1 +
 build/windows/installer/lang/Makefile.am | 1 +
 build/windows/installer/lang/meson.build | 1 +
 3 files changed, 3 insertions(+)
---
diff --git a/build/windows/installer/gimp3264.iss b/build/windows/installer/gimp3264.iss
index e65cd52015..8ef5242f4b 100755
--- a/build/windows/installer/gimp3264.iss
+++ b/build/windows/installer/gimp3264.iss
@@ -199,6 +199,7 @@ Name: "it"; MessagesFile: "compiler:Languages\Italian.isl,lang\it.setup.isl"
 Name: "ja"; MessagesFile: "compiler:Languages\Japanese.isl,lang\ja.setup.isl"
 Name: "kab"; MessagesFile: "compiler:Default.isl,lang\kab.setup.isl"
 Name: "ko"; MessagesFile: "compiler:Languages\Unofficial\Korean.isl,lang\ko.setup.isl"
+Name: "lt"; MessagesFile: "compiler:Languages\Unofficial\Lithuanian.isl,lang\lt.setup.isl"
 Name: "lv"; MessagesFile: "compiler:Languages\Unofficial\Latvian.isl,lang\lv.setup.isl"
 Name: "mr"; MessagesFile: "compiler:Languages\Unofficial\Marathi.islu,lang\mr.setup.isl"
 Name: "ms"; MessagesFile: "compiler:Languages\Unofficial\Malaysian.isl,lang\ms.setup.isl"
diff --git a/build/windows/installer/lang/Makefile.am b/build/windows/installer/lang/Makefile.am
index dcf5c792eb..98f766436e 100644
--- a/build/windows/installer/lang/Makefile.am
+++ b/build/windows/installer/lang/Makefile.am
@@ -28,6 +28,7 @@ languages = \
        ja:[ja]:CP932                   \
        kab:[kab]:UTF-8                 \
        ko:[ko]:EUC-KR                  \
+       lt:[lt]:ISO-8859-13             \
        lv:[lv]:ISO-8859-13             \
        mr:[mr]:UTF-8                   \
        ms:[ms]:UTF-8                   \
diff --git a/build/windows/installer/lang/meson.build b/build/windows/installer/lang/meson.build
index f9205f553b..1604efcc65 100644
--- a/build/windows/installer/lang/meson.build
+++ b/build/windows/installer/lang/meson.build
@@ -34,6 +34,7 @@ languages = [
   { 'code': 'ja',    'encoding': 'CP932',        },
   { 'code': 'kab',   'encoding': 'UTF-8',        },
   { 'code': 'ko',    'encoding': 'EUC-KR',       },
+  { 'code': 'lt',    'encoding': 'ISO-8859-13',  },
   { 'code': 'lv',    'encoding': 'ISO-8859-13',  },
   { 'code': 'mr',    'encoding': 'UTF-8',  },
   { 'code': 'ms',    'encoding': 'UTF-8',  },