A number of fixes to packageBinaries.pl:

1. Do not build debug version for Win XP 64 bit build
2. ICU build should also use variables opt_c and opt_x for compiler choice
3. typo fix


git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@174833 13f79535-47bb-0310-9956-ffa450edef68