Async initialization for DateFormat

pkg/intl/data/dates/symbols/sw.json

Index: pkg/intl/data/dates/symbols/sw.json
===================================================================
--- pkg/intl/data/dates/symbols/sw.json	(revision 0)
+++ pkg/intl/data/dates/symbols/sw.json	(revision 0)
@@ -0,0 +1 @@
+{"DATEFORMATS":["EEEE, d MMMM y","d MMMM y","d MMM y","dd/MM/yyyy"],"NARROWWEEKDAYS":["2","3","4","5","A","I","1"],"STANDALONESHORTMONTHS":["Jan","Feb","Mac","Apr","Mei","Jun","Jul","Ago","Sep","Okt","Nov","Des"],"ERANAMES":["Kabla ya Kristo","Baada ya Kristo"],"FIRSTWEEKCUTOFFDAY":6,"NARROWMONTHS":["J","F","M","A","M","J","J","A","S","O","N","D"],"STANDALONESHORTWEEKDAYS":["J2","J3","J4","J5","Alh","Ij","J1"],"FIRSTDAYOFWEEK":0,"STANDALONEWEEKDAYS":["Jumapili","Jumatatu","Jumanne","Jumatano","Alhamisi","Ijumaa","Jumamosi"],"WEEKDAYS":["Jumapili","Jumatatu","Jumanne","Jumatano","Alhamisi","Ijumaa","Jumamosi"],"QUARTERS":["Robo 1","Robo 2","Robo 3","Robo 4"],"ERAS":["KK","BK"],"MONTHS":["Januari","Februari","Machi","Aprili","Mei","Juni","Julai","Agosti","Septemba","Oktoba","Novemba","Desemba"],"TIMEFORMATS":["h:mm:ss a zzzz","h:mm:ss a z","h:mm:ss a","h:mm a"],"SHORTWEEKDAYS":["J2","J3","J4","J5","Alh","Ij","J1"],"SHORTQUARTERS":["R1","R2","R3","R4"],"WEEKENDRANGE":[5,6],"STANDALONENARROWWEEKDAYS":["2","3","4","5","A","I","1"],"AVAILABLEFORMATS":null,"NAME":"sw","AMPMS":["asubuhi","alasiri"],"STANDALONEMONTHS":["Januari","Februari","Machi","Aprili","Mei","Juni","Julai","Agosti","Septemba","Oktoba","Novemba","Desemba"],"SHORTMONTHS":["Jan","Feb","Mac","Apr","Mei","Jun","Jul","Ago","Sep","Okt","Nov","Des"],"STANDALONENARROWMONTHS":["J","F","M","A","M","J","J","A","S","O","N","D"]}