modify update_icons script to handle some more numerical values. (#20387)

* update script

* Update update_icons.dart

* Update update_icons.dart

dev/tools/update_icons.dart

@@ -24,8 +24,51 @@ const String kEndGeneratedMark = '// END GENERATED';
 const Map<String, String> kIdentifierRewrites = <String, String>{
   '360': 'threesixty',
   '3d_rotation': 'threed_rotation',
+  '1k': 'one_k',
+  '2k': 'two_k',
+  '3k': 'three_k',
   '4k': 'four_k',
+  '5k': 'five_k',
+  '6k': 'six_k',
+  '7k': 'seven_k',
+  '8k': 'eight_k',
+  '9k': 'nine_k',
+  '10k': 'ten_k',
+  '1k_plus': 'one_k_plus',
+  '2k_plus': 'two_k_plus',
+  '3k_plus': 'three_k_plus',
+  '4k_plus': 'four_k_plus',
+  '5k_plus': 'five_k_plus',
+  '6k_plus': 'six_k_plus',
+  '7k_plus': 'seven_k_plus',
+  '8k_plus': 'eight_k_plus',
+  '9k_plus': 'nine_k_plus',
+  '1mp': 'one_mp',
+  '2mp': 'two_mp',
+  '3mp': 'three_mp',
+  '4mp': 'four_mp',
+  '5mp': 'five_mp',
+  '6mp': 'six_mp',
+  '7mp': 'seven_mp',
+  '8mp': 'eight_mp',
+  '9mp': 'nine_mp',
+  '10mp': 'ten_mp',
+  '11mp': 'eleven_mp',
+  '12mp': 'twelve_mp',
+  '13mp': 'thirteen_mp',
+  '14mp': 'fourteen_mp',
+  '15mp': 'fifteen_mp',
+  '16mp': 'sixteen_mp',
+  '17mp': 'seventeen_mp',
+  '18mp': 'eighteen_mp',
+  '19mp': 'nineteen_mp',
+  '20mp': 'twenty_mp',
+  '21mp': 'twenty_one_mp',
+  '22mp': 'twenty_two_mp',
+  '23mp': 'twenty_three_mp',
+  '24mp': 'twenty_four_mp',
   'class': 'class_',
+
 };
 
 final Set<String> kMirroredIcons = new Set<String>.from(<String>[