Update IANA timezone db to 2020c

https://mm.icann.org/pipermail/tz-announce/2020-October/000060.html

   Briefly:
     Fiji starts DST later than usual, on 2020-12-20.

   Changes to future timestamps

     Fiji will start DST on 2020-12-20, instead of 2020-11-08 as
     previously predicted.  DST will still end on 2021-01-17.
     (Thanks to Raymond Kumar and Alan Mintz.)  Assume for now that
     the later-than-usual start date is a one-time departure from the
     recent pattern.

Either in JS console in Chrome or v8 should work like these:
const df1 = new Intl.DateTimeFormat("en",{timeZone: "Pacific/Fiji", timeStyle: "long", dateStyle: "long"})
const d3= new Date("2020-12-19T00:00:00.000Z");
const d4= new Date("2020-12-20T00:00:00.000Z");

df1.format(d3)
df1.format(d4)

Before the change:
"December 19, 2020 at 1:00:00 PM GMT+13"
"December 20, 2020 at 1:00:00 PM GMT+13"

After the change:
"December 19, 2020 at 12:00:00 PM GMT+12"
"December 20, 2020 at 1:00:00 PM GMT+13"

TBR=jshin@chromium.org
Bug: 1141065
Change-Id: I4ae2922b1f9ff573c6d04bcaad1223be79e2408f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/2494505
Reviewed-by: Frank Tang <ftang@chromium.org>
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/icu/+/449854
Reviewed-by: Fabrice de Gans-Riberi <fdegans@google.com>
diff --git a/README.chromium b/README.chromium
index 428f7fd..ee9769a 100644
--- a/README.chromium
+++ b/README.chromium
@@ -195,7 +195,7 @@
      windowsZones.txt
      zoneinfo64.txt
 
-  As of Octber 13, 2020, the latest version is 2020b and the above files
+  As of Octber 23, 2020, the latest version is 2020c and the above files
   are available at the ICU github repos.
 
 4. Build-related changes
diff --git a/android/icudtl.dat b/android/icudtl.dat
index 641da59..e92cdad 100644
--- a/android/icudtl.dat
+++ b/android/icudtl.dat
Binary files differ
diff --git a/android_small/icudtl.dat b/android_small/icudtl.dat
index 157c612..15536cb 100644
--- a/android_small/icudtl.dat
+++ b/android_small/icudtl.dat
Binary files differ
diff --git a/cast/icudtl.dat b/cast/icudtl.dat
index 2d24597..e2850bf 100644
--- a/cast/icudtl.dat
+++ b/cast/icudtl.dat
Binary files differ
diff --git a/chromeos/icudtl.dat b/chromeos/icudtl.dat
index 8fd2027..2049849 100644
--- a/chromeos/icudtl.dat
+++ b/chromeos/icudtl.dat
Binary files differ
diff --git a/common/icudtb.dat b/common/icudtb.dat
index 9a3aa90..dc49864 100644
--- a/common/icudtb.dat
+++ b/common/icudtb.dat
Binary files differ
diff --git a/common/icudtl.dat b/common/icudtl.dat
index 734c8fb..10f6019 100644
--- a/common/icudtl.dat
+++ b/common/icudtl.dat
Binary files differ
diff --git a/ios/icudtl.dat b/ios/icudtl.dat
index 4214f27..3240094 100644
--- a/ios/icudtl.dat
+++ b/ios/icudtl.dat
Binary files differ
diff --git a/source/data/misc/zoneinfo64.txt b/source/data/misc/zoneinfo64.txt
index 71fa660..93a38f6 100644
--- a/source/data/misc/zoneinfo64.txt
+++ b/source/data/misc/zoneinfo64.txt
@@ -3,9 +3,9 @@
 // License & terms of use: http://www.unicode.org/copyright.html
 //---------------------------------------------------------
 // Build tool:  tz2icu
-// Build date:  Thu Oct  8 19:58:22 2020
+// Build date:  Mon Oct 19 12:18:21 2020
 // tz database: ftp://ftp.iana.org/tz/
-// tz version:  2020b
+// tz version:  2020c
 // ICU version: 68.1
 //---------------------------------------------------------
 // >> !!! >>   THIS IS A MACHINE-GENERATED FILE   << !!! <<
@@ -13,7 +13,7 @@
 //---------------------------------------------------------
 
 zoneinfo64:table(nofallback) {
- TZVersion { "2020b" }
+ TZVersion { "2020c" }
  Zones:array { 
   /* ACT */ :int { 356 } //Z#0
   /* AET */ :int { 368 } //Z#1
@@ -2601,12 +2601,12 @@
     typeMap:bin { "0102" }
   } //Z#560
   /* Pacific/Fiji */ :table {
-    trans:intvector { -1709985344, 909842400, 920124000, 941896800, 951573600, 1259416800, 1269698400, 1287842400, 1299333600, 1319292000, 1327154400, 1350741600, 1358604000, 1382796000, 1390050000, 1414850400, 1421503200, 1446300000, 1452952800, 1478354400, 1484402400, 1509804000, 1515852000, 1541253600, 1547301600, 1573308000 }
+    trans:intvector { -1709985344, 909842400, 920124000, 941896800, 951573600, 1259416800, 1269698400, 1287842400, 1299333600, 1319292000, 1327154400, 1350741600, 1358604000, 1382796000, 1390050000, 1414850400, 1421503200, 1446300000, 1452952800, 1478354400, 1484402400, 1509804000, 1515852000, 1541253600, 1547301600, 1573308000, 1578751200, 1608386400, 1610805600, 1636812000 }
     typeOffsets:intvector { 42944, 0, 43200, 0, 43200, 3600 }
-    typeMap:bin { "0102010201020102010201020102010201020102010201020102" }
+    typeMap:bin { "010201020102010201020102010201020102010201020102010201020102" }
     finalRule { "Fiji" }
     finalRaw:int { 43200 }
-    finalYear:int { 2020 }
+    finalYear:int { 2022 }
   } //Z#561
   /* Pacific/Funafuti */ :table {
     transPre32:intvector { -1, 2117471484 }
diff --git a/tzres/zoneinfo64.res b/tzres/zoneinfo64.res
index ac6fddb..ddcbdab 100644
--- a/tzres/zoneinfo64.res
+++ b/tzres/zoneinfo64.res
Binary files differ