Update language-data from upstream

* Add gor and btm
* Update autonym for brx

Updating to
https://github.com/wikimedia/language-data/commit/057affa5a121b2d74e75264fbd45ce885402ae69

src/jquery.uls.data.js

@@ -486,7 +486,7 @@ module.exports=( function ( $ ) {
             [
                 "AS"
             ],
-            "बड़ो"
+            "बर'"
         ],
         "bs": [
             "Latn",
@@ -495,6 +495,13 @@ module.exports=( function ( $ ) {
             ],
             "bosanski"
         ],
+        "btm": [
+            "Latn",
+            [
+                "AS"
+            ],
+            "Mandailing"
+        ],
         "bto": [
             "Latn",
             [
@@ -1191,6 +1198,13 @@ module.exports=( function ( $ ) {
             ],
             "Gõychi Konknni"
         ],
+        "gor": [
+            "Latn",
+            [
+                "AS"
+            ],
+            "Bahasa Hulontalo"
+        ],
         "got": [
             "Goth",
             [
@@ -4662,6 +4676,7 @@ module.exports=( function ( $ ) {
             "bbc-latn",
             "zh-hant",
             "zh",
+            "gor",
             "sly",
             "mwv"
         ],