Bug 1580094 - Add 'ca-valencia' to Firefox Nightly build r=Pike

Differential Revision: https://phabricator.services.mozilla.com/D45550

--HG--
extra : moz-landing-system : lando

browser/locales/all-locales

@@ -10,6 +10,7 @@ bn
 br
 bs
 ca
+ca-valencia
 cak
 cs
 cy

browser/locales/l10n.toml

@@ -17,6 +17,7 @@ locales = [
     "br",
     "bs",
     "ca",
+    "ca-valencia",
     "cak",
     "cs",
     "cy",