Add Abron (a.k.a. Bono, Brong, abr)

Downstream task:
https://phabricator.wikimedia.org/T369464

data/langdb.yaml

@@ -3,6 +3,7 @@ languages:
   aae: [Latn, [EU], arbërisht]
   ab: [Cyrl, [EU], аԥсшәа]
   abe: [Latn, [AM], Wôbanakiôdwawôgan]
+  abr: [Latn, [AF], Abron]
   abs: [Latn, [AS], Bahasa Ambon]
   ace: [Latn, [AS, PA], Acèh]
   acf: [Latn, [AM], Kwéyòl Sent Lisi]

data/language-data.json

@@ -28,6 +28,13 @@
             ],
             "Wôbanakiôdwawôgan"
         ],
+        "abr": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "Abron"
+        ],
         "abs": [
             "Latn",
             [
@@ -6010,6 +6017,7 @@
         "GH": [
             "en",
             "ee",
+            "abr",
             "gur",
             "ada",
             "gaa",