Async initialization for DateFormat

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

Index: pkg/intl/data/dates/symbols/tr.json
===================================================================
--- pkg/intl/data/dates/symbols/tr.json	(revision 0)
+++ pkg/intl/data/dates/symbols/tr.json	(revision 0)
@@ -0,0 +1 @@
+{"DATEFORMATS":["d MMMM y EEEE","d MMMM y","d MMM y","dd MM yyyy"],"NARROWWEEKDAYS":["P","P","S","Ç","P","C","C"],"STANDALONESHORTMONTHS":["Oca","Şub","Mar","Nis","May","Haz","Tem","Ağu","Eyl","Eki","Kas","Ara"],"ERANAMES":["Milattan Önce","Milattan Sonra"],"FIRSTWEEKCUTOFFDAY":6,"NARROWMONTHS":["O","Ş","M","N","M","H","T","A","E","E","K","A"],"STANDALONESHORTWEEKDAYS":["Paz","Pzt","Sal","Çar","Per","Cum","Cmt"],"FIRSTDAYOFWEEK":0,"STANDALONEWEEKDAYS":["Pazar","Pazartesi","Salı","Çarşamba","Perşembe","Cuma","Cumartesi"],"WEEKDAYS":["Pazar","Pazartesi","Salı","Çarşamba","Perşembe","Cuma","Cumartesi"],"QUARTERS":["1. çeyrek","2. çeyrek","3. çeyrek","4. çeyrek"],"ERAS":["MÖ","MS"],"MONTHS":["Ocak","Şubat","Mart","Nisan","Mayıs","Haziran","Temmuz","Ağustos","Eylül","Ekim","Kasım","Aralık"],"TIMEFORMATS":["HH:mm:ss zzzz","HH:mm:ss z","HH:mm:ss","HH:mm"],"SHORTWEEKDAYS":["Paz","Pzt","Sal","Çar","Per","Cum","Cmt"],"SHORTQUARTERS":["Ç1","Ç2","Ç3","Ç4"],"WEEKENDRANGE":[5,6],"STANDALONENARROWWEEKDAYS":["P","P","S","Ç","P","C","C"],"AVAILABLEFORMATS":null,"NAME":"tr","AMPMS":["AM","PM"],"STANDALONEMONTHS":["Ocak","Şubat","Mart","Nisan","Mayıs","Haziran","Temmuz","Ağustos","Eylül","Ekim","Kasım","Aralık"],"SHORTMONTHS":["Oca","Şub","Mar","Nis","May","Haz","Tem","Ağu","Eyl","Eki","Kas","Ara"],"STANDALONENARROWMONTHS":["O","Ş","M","N","M","H","T","A","E","E","K","A"]}