Update ICU to 58.1

source/data/translit/ia_ia_FONIPA.txt

Index: source/data/translit/ia_ia_FONIPA.txt
diff --git a/source/data/translit/ia_ia_FONIPA.txt b/source/data/translit/ia_ia_FONIPA.txt
old mode 100755
new mode 100644
index 3486205145e1747ab8e2cdf0e71a74fc4ab9d215..48210de3a38d72fca0d6cd2311652aa2154c180c
--- a/source/data/translit/ia_ia_FONIPA.txt
+++ b/source/data/translit/ia_ia_FONIPA.txt
@@ -1,22 +1,24 @@
-# ***************************************************************************
-# *
-# *  Copyright (C) 2004-2015, International Business Machines
-# *  Corporation; Unicode, Inc.; and others.  All Rights Reserved.
-# *
-# ***************************************************************************
+# © 2016 and later: Unicode, Inc. and others.
+# License & terms of use: http://www.unicode.org/copyright.html#License
+#
 # File: ia_ia_FONIPA.txt
-# Generated from CLDR 
+# Generated from CLDR
 #
 
+# Transformation from Interlingua (ia) to its IPA transcription (ia_FONIPA).
+# http://en.wikipedia.org/wiki/Interlingua#Interlingua_alphabet
+# http://www.omniglot.com/writing/interlingua.htm
 ::NFC;
 ::Lower;
-
+# Interlinua has five falling diphthongs.
+# http://en.wikipedia.org/wiki/Interlingua#Orthography_and_pronunciation
 ai → ai\u032F;
 au → au\u032F;
 ei → ei\u032F;  # rare
 eu → eu\u032F;
 oi → oi\u032F;  # rare
-
+# ‹g› is usually [ɡ], but it is [d\u0361ʒ] in -age, -agi-, and -egi-.
+# http://www.omniglot.com/writing/interlingua.htm
 $vowel = [aeiouy];
 $end_of_word = [$ ];
 {age} $end_of_word → ad\u0361ʒe;
@@ -26,11 +28,10 @@ agi → ad\u0361ʒi;
 egi → ed\u0361ʒi;
 gg → ɡ;
 g → ɡ;
-
+# Omniglot: “The sounds of g and k assimilate a preceding n as in English.”
 {n} [gkqx] → ŋ;
 nn → n;
 n → n;
-
 a → a;
 bb → b;
 b → b;
@@ -73,3 +74,4 @@ w → v;
 x → ks;
 y → i;
 z → z;
+