CLDR-13281 Metazone mapping update for tz 2019c

Apply upstream CLDR changes for tzdb 2019c.

(cherry picked from commit b7ed15f9ee30d3678ec644220ca3757abb477fb1)
Bug: 140922782
Test: None
Change-Id: Ib7b91b785a0065c0e2dff32ce87c6b379322758b
diff --git a/common/supplemental/metaZones.xml b/common/supplemental/metaZones.xml
index 2d9d12a..d0656d3 100644
--- a/common/supplemental/metaZones.xml
+++ b/common/supplemental/metaZones.xml
@@ -1243,8 +1243,8 @@
 				<usesMetazone mzone="GMT" from="1971-10-31 02:00"/>
 			</timezone>
 			<timezone type="Europe/Istanbul">
-				<usesMetazone to="1978-10-14 21:00" mzone="Europe_Eastern"/>
-				<usesMetazone to="1985-04-19 21:00" from="1978-10-14 21:00" mzone="Turkey"/>
+				<usesMetazone to="1978-06-28 21:00" mzone="Europe_Eastern"/>
+				<usesMetazone to="1985-04-19 21:00" from="1978-06-28 21:00" mzone="Turkey"/>
 				<usesMetazone to="2016-09-06 21:00" from="1985-04-19 21:00" mzone="Europe_Eastern"/>
 				<usesMetazone from="2016-09-06 21:00" mzone="Turkey"/>
 			</timezone>