[lang] updated language files from Transifex

language/resource.language.cy_gb/strings.po

@@ -80,6 +80,10 @@ msgctxt "#31015"
 msgid "Minute"
 msgstr "Munud"
 
+msgctxt "#31017"
+msgid "Unavailable"
+msgstr "Ddim ar gael"
+
 msgctxt "#31023"
 msgid "Playing"
 msgstr "Chwarae"
@@ -200,6 +204,10 @@ msgctxt "#31112"
 msgid "Options"
 msgstr "Dewisiadau"
 
+msgctxt "#31114"
+msgid "System"
+msgstr "System"
+
 msgctxt "#31128"
 msgid "Lyrics"
 msgstr "Geiriau Caneuon"