misc/notepadplus: fix some number syntax highlight issue

notepadplus can only support some normal golang's hex and imaginary numbers.
it can't detect some special number, eg. 1./1.e/1.i/1+0.1i (omit "0" in ".0").

R=golang-dev, gvdschoot
CC=ajstarks, golang-dev
https://golang.org/cl/13401047

misc/notepadplus/userDefineLang.xml

@@ -7,11 +7,11 @@
         <KeywordLists>
             <Keywords name="Comments">00// 01 02 03/* 04*/</Keywords>
             <Keywords name="Numbers, prefix1"></Keywords>
-            <Keywords name="Numbers, prefix2"></Keywords>
-            <Keywords name="Numbers, extras1"></Keywords>
+            <Keywords name="Numbers, prefix2">0x 0X</Keywords>
+            <Keywords name="Numbers, extras1">a b c d e f A B C D E F</Keywords>
             <Keywords name="Numbers, extras2"></Keywords>
             <Keywords name="Numbers, suffix1"></Keywords>
-            <Keywords name="Numbers, suffix2"></Keywords>
+            <Keywords name="Numbers, suffix2">i</Keywords>
             <Keywords name="Numbers, range"></Keywords>
             <Keywords name="Operators1">( ) [ ] { } ... , ; &amp; ^ % &gt; &lt; ! = + - * / | :</Keywords>
             <Keywords name="Operators2"></Keywords>