Change hak configuration in line with core MediaWiki (#371)

Core MediaWiki now uses three separate codes for
three scripts, and one code that includes two names.
See https://gerrit.wikimedia.org/r/c/mediawiki/core/+/876411

data/langdb.yaml

@@ -294,9 +294,10 @@ languages:
   ha-arab: [Arab, [AF], هَوُسَ]
   ha-latn: [ha]
   hai: [Latn, [AM], X̱aat Kíl]
-  hak: [Latn, [AS], Hak-kâ-fa]
+  hak: [Hant, [AS], 客家語 / Hak-kâ-ngî]
   hak-hans: [Hans, [AS], 客家语（简体）]
   hak-hant: [Hant, [AS], 客家語（繁體）]
+  hak-latn: [Latn, [AS], Hak-kâ-ngî (Pha̍k-fa-sṳ)]
   haw: [Latn, [AM, PA], Hawaiʻi]
   he: [Hebr, [ME], עברית]
   hi: [Deva, [AS], हिन्दी]