Update ICU to 54.1 step 1

source/data/mappings/windows-936-2000.ucm

Index: source/data/mappings/windows-936-2000.ucm
diff --git a/source/data/mappings/windows-936-2000.ucm b/source/data/mappings/windows-936-2000.ucm
index e66909577705cb478cfd5d8c366c99afb2114bc2..6cfafabd9dc375367bfe2e17b4763afe3fe6a96c 100644
--- a/source/data/mappings/windows-936-2000.ucm
+++ b/source/data/mappings/windows-936-2000.ucm
@@ -37,8 +37,7 @@
 
 # build an extension-only (delta) .cnv file
 # requires the base .cnv file at runtime
-# CHROME : we don't want ibm-1386
-#<icu:base>                    "ibm-1386_P100-2001"
+<icu:base>                    "ibm-1386_P100-2001"
 
 # The following was the generated state table.
 # This does not account for unassigned characters
@@ -260,7 +259,6 @@ CHARMAP
 <U01DA> \xA8\xB7 |0
 <U01DB> \xA8\xB8 |1
 <U01DC> \xA8\xB8 |0
-<U01F9> \xA8\xBF |1
 <U0251> \xA8\xBB |0
 <U0261> \xA8\xC0 |0
 <U02C7> \xA1\xA6 |0
@@ -382,7 +380,6 @@ CHARMAP
 <U044E> \xA7\xF0 |0
 <U044F> \xA7\xF1 |0
 <U0451> \xA7\xD7 |0
-<U1E3F> \xA8\xBC |1
 <U2010> \xA9\x5C |0
 <U2013> \xA8\x43 |0
 <U2014> \xA1\xAA |0
@@ -475,7 +472,6 @@ CHARMAP
 <U2299> \xA1\xD1 |0
 <U22A5> \xA1\xCD |0
 <U22BF> \xA8\x53 |0
-<U22EF> \xA1\xAD |1
 <U2312> \xA1\xD0 |0
 <U2460> \xA2\xD9 |0
 <U2461> \xA2\xDA |0
@@ -700,7 +696,6 @@ CHARMAP
 <U3015> \xA1\xB3 |0
 <U3016> \xA1\xBC |0
 <U3017> \xA1\xBD |0
-<U301C> \xA1\xAB |1
 <U301D> \xA8\x94 |0
 <U301E> \xA8\x95 |0
 <U3021> \xA9\x40 |0