Intl.getCanonicalLocales changes for UTS 35

intl402/Intl/getCanonicalLocales/canonicalized-tags.js
- Sign languages are no longer canonicalised.
- Variant subtags are sorted alphabetically.

intl402/Intl/getCanonicalLocales/preferred-grandfathered.js
- Canonical form of "cel-gaulish" is "xtg-x-cel-gaulish".

intl402/Intl/getCanonicalLocales/preferred-variant.js
- Variant subtags are no longer canonicalised.

test/intl402/Intl/getCanonicalLocales/canonicalized-tags.js

@@ -37,13 +37,13 @@ var canonicalizedTags = {
   "es-419-u-nu-latn": "es-419-u-nu-latn",
   "cmn-hans-cn-u-ca-t-ca-x-t-u": "zh-Hans-CN-t-ca-u-ca-x-t-u",
   "de-gregory-u-ca-gregory": "de-gregory-u-ca-gregory",
-  "sgn-GR": "gss",
+  "sgn-GR": "sgn-GR",
   "ji": "yi",
   "de-DD": "de-DE",
   "in": "id",
   "sr-cyrl-ekavsk": "sr-Cyrl-ekavsk",
   "en-ca-newfound": "en-CA-newfound",
-  "sl-rozaj-biske-1994": "sl-rozaj-biske-1994",
+  "sl-rozaj-biske-1994": "sl-1994-biske-rozaj",
   "da-u-attr": "da-u-attr",
   "da-u-attr-co-search": "da-u-attr-co-search",
 };

test/intl402/Intl/getCanonicalLocales/preferred-grandfathered.js

@@ -62,7 +62,7 @@ var regularGrandfatheredNonUTS35 = [
 
 var regularGrandfatheredUTS35 = {
   "art-lojban": "jbo",
-  "cel-gaulish": "und-x-cel-gaulish",
+  "cel-gaulish": "xtg-x-cel-gaulish",
   "zh-guoyu": "zh",
   "zh-hakka": "hak",
   "zh-xiang": "hsn",

test/intl402/Intl/getCanonicalLocales/preferred-variant.js

@@ -39,7 +39,9 @@ includes: [testIntl.js]
 // Generated from http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
 // File-Date: 2017-08-15
 var canonicalizedTags = {
-  "ja-latn-hepburn-heploc": "ja-Latn-alalc97",
+  // ECMA-402 currently requires that variant subtags are not canonicalized.
+  // https://github.com/tc39/ecma402/issues/330
+  "ja-latn-hepburn-heploc": "ja-Latn-hepburn-heploc",
 };
 
 // make sure the data above is correct