Update language-data from upstream

Add Iraqi Arabic.

Updating to
https://github.com/wikimedia/language-data/commit/7de21c489f564008103f668da1587059c1be0ca4

src/jquery.uls.data.js

@@ -48,6 +48,13 @@
             ],
             "kwéyòl"
         ],
+        "acm": [
+            "Arab",
+            [
+                "ME"
+            ],
+            "عراقي"
+        ],
         "ady": [
             "Cyrl",
             [