Add wuu and yue variants (#302)

Downstream bug:
https://phabricator.wikimedia.org/T340674

data/langdb.yaml

@@ -766,6 +766,8 @@ languages:
   wls: [Latn, [PA], "Faka'uvea"]
   wo: [Latn, [AF], Wolof]
   wuu: [Hans, [AS], 吴语]
+  wuu-hans: [Hans, [AS], 吴语（简体）]
+  wuu-hant: [Hant, [AS], 吳語（正體）]
   xal: [Cyrl, [EU], хальмг]
   xh: [Latn, [AF], isiXhosa]
   xmf: [Geor, [EU], მარგალური]
@@ -779,6 +781,8 @@ languages:
   yrl: [Latn, [AM], Nhẽẽgatú]
   yua: [Latn, [AM], "Maaya T'aan"]
   yue: [Hant, [AS], 粵語]
+  yue-hans: [Hans, [AS], 粵语（简体）]
+  yue-hant: [Hant, [AS], 粵語（繁體）]
   za: [Latn, [AS], Vahcuengh]
   zea: [Latn, [EU], Zeêuws]
   zgh: [Tfng, [AF], ⵜⴰⵎⴰⵣⵉⵖⵜ ⵜⴰⵏⴰⵡⴰⵢⵜ]