Update Windows time zone mappings using latest CLDR data

sql/win_tzname_data.h

@@ -44,7 +44,7 @@
 {L"UTC-02","Etc/GMT+2"},
 {L"Azores Standard Time","Atlantic/Azores"},
 {L"Cape Verde Standard Time","Atlantic/Cape_Verde"},
-{L"UTC","Etc/GMT"},
+{L"UTC","Etc/UTC"},
 {L"GMT Standard Time","Europe/London"},
 {L"Greenwich Standard Time","Atlantic/Reykjavik"},
 {L"Sao Tome Standard Time","Africa/Sao_Tome"},
@@ -64,6 +64,7 @@
 {L"South Africa Standard Time","Africa/Johannesburg"},
 {L"FLE Standard Time","Europe/Kiev"},
 {L"Israel Standard Time","Asia/Jerusalem"},
+{L"South Sudan Standard Time","Africa/Juba"},
 {L"Kaliningrad Standard Time","Europe/Kaliningrad"},
 {L"Sudan Standard Time","Africa/Khartoum"},
 {L"Libya Standard Time","Africa/Tripoli"},