Add Khoekhoe (a.k.a. Nama, naq) (#385)

Downstream task:
https://phabricator.wikimedia.org/T375535

data/langdb.yaml

@@ -532,6 +532,7 @@ languages:
   nan-latn-pehoeji: [Latn, [AS], Bân-lâm-gú (Pe̍h-ōe-jī)]
   nan-latn-tailo: [Latn, [AS], Bân-lâm-gú (Tâi-lô)]
   nap: [Latn, [EU], Napulitano]
+  naq: [Latn, [AF], Khoekhoegowab]
   nb: [Latn, [EU], norsk (bokmål)]
   nd: [Latn, [AF], siNdebele saseNyakatho]
   nds: [Latn, [EU], Plattdüütsch]

data/language-data.json

@@ -3347,6 +3347,13 @@
             ],
             "Napulitano"
         ],
+        "naq": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "Khoekhoegowab"
+        ],
         "nb": [
             "Latn",
             [
@@ -6670,6 +6677,7 @@
             "af",
             "kj",
             "ng",
+            "naq",
             "hz",
             "en",
             "de",