LibUnicode: Extract the BCP 47 package from the CLDR

This package was originally meant to be included in CLDR version 40, but
was missed in their release scripts. This has been resolved:
https://unicode-org.atlassian.net/browse/CLDR-15158

Unfortunately, the CLDR was re-released with the same version number. So
to bust the build's CLDR cache, change the "version" used to detect that
we need to redownload the CLDR.

Meta/CMake/unicode_data.cmake

@@ -1,7 +1,11 @@
 include(${CMAKE_CURRENT_LIST_DIR}/utils.cmake)
 
 set(UCD_VERSION 14.0.0)
-set(CLDR_VERSION 40.0.0)
+set(CLDR_VERSION 40.0.0-updated)
+
+# FIXME: When the CLDR is bumped to version 41, we can remove this. A bugfix to the CLDR was released with the same
+#        version number, so the CLDR_VERSION number above is a fake number to force a redownload.
+set(CLDR_REAL_VERSION 40.0.0)
 
 set(UCD_PATH "${CMAKE_BINARY_DIR}/UCD" CACHE PATH "Download location for UCD files")
 set(CLDR_PATH "${CMAKE_BINARY_DIR}/CLDR" CACHE PATH "Download location for CLDR files")
@@ -60,9 +64,12 @@ set(WORD_BREAK_PROP_PATH "${UCD_PATH}/WordBreakProperty.txt")
 set(SENTENCE_BREAK_PROP_URL "https://www.unicode.org/Public/${UCD_VERSION}/ucd/auxiliary/SentenceBreakProperty.txt")
 set(SENTENCE_BREAK_PROP_PATH "${UCD_PATH}/SentenceBreakProperty.txt")
 
-set(CLDR_ZIP_URL "https://github.com/unicode-org/cldr-json/releases/download/${CLDR_VERSION}/cldr-${CLDR_VERSION}-json-modern.zip")
+set(CLDR_ZIP_URL "https://github.com/unicode-org/cldr-json/releases/download/${CLDR_REAL_VERSION}/cldr-${CLDR_REAL_VERSION}-json-modern.zip")
 set(CLDR_ZIP_PATH "${CLDR_PATH}/cldr.zip")
 
+set(CLDR_BCP47_SOURCE cldr-bcp47)
+set(CLDR_BCP47_PATH "${CLDR_PATH}/${CLDR_BCP47_SOURCE}")
+
 set(CLDR_CORE_SOURCE cldr-core)
 set(CLDR_CORE_PATH "${CLDR_PATH}/${CLDR_CORE_SOURCE}")
 
@@ -114,6 +121,7 @@ if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
     download_file("${SENTENCE_BREAK_PROP_URL}" "${SENTENCE_BREAK_PROP_PATH}")
 
     download_file("${CLDR_ZIP_URL}" "${CLDR_ZIP_PATH}")
+    extract_cldr_file("${CLDR_BCP47_SOURCE}" "${CLDR_BCP47_PATH}")
     extract_cldr_file("${CLDR_CORE_SOURCE}" "${CLDR_CORE_PATH}")
     extract_cldr_file("${CLDR_DATES_SOURCE}" "${CLDR_DATES_PATH}")
     extract_cldr_file("${CLDR_LOCALES_SOURCE}" "${CLDR_LOCALES_PATH}")
@@ -182,7 +190,7 @@ if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
         "${UNICODE_META_TARGET_PREFIX}"
         "${UNICODE_LOCALE_HEADER}"
         "${UNICODE_LOCALE_IMPLEMENTATION}"
-        arguments -r "${CLDR_CORE_PATH}" -l "${CLDR_LOCALES_PATH}" -m "${CLDR_MISC_PATH}" -n "${CLDR_NUMBERS_PATH}" -d "${CLDR_DATES_PATH}"
+        arguments -b "${CLDR_BCP47_PATH}" -r "${CLDR_CORE_PATH}" -l "${CLDR_LOCALES_PATH}" -m "${CLDR_MISC_PATH}" -n "${CLDR_NUMBERS_PATH}" -d "${CLDR_DATES_PATH}"
     )
     invoke_generator(
         "UnicodeNumberFormat"

Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeLocale.cpp

@@ -1462,6 +1462,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     StringView generated_header_path;
     StringView generated_implementation_path;
+    StringView bcp47_path;
     StringView core_path;
     StringView locale_names_path;
     StringView misc_path;
@@ -1471,6 +1472,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     Core::ArgsParser args_parser;
     args_parser.add_option(generated_header_path, "Path to the Unicode locale header file to generate", "generated-header-path", 'h', "generated-header-path");
     args_parser.add_option(generated_implementation_path, "Path to the Unicode locale implementation file to generate", "generated-implementation-path", 'c', "generated-implementation-path");
+    args_parser.add_option(bcp47_path, "Path to cldr-bcp47 directory", "bcp47-path", 'b', "bcp47-path");
     args_parser.add_option(core_path, "Path to cldr-core directory", "core-path", 'r', "core-path");
     args_parser.add_option(locale_names_path, "Path to cldr-localenames directory", "locale-names-path", 'l', "locale-names-path");
     args_parser.add_option(misc_path, "Path to cldr-misc directory", "misc-path", 'm', "misc-path");