Intermediate build folder for the xml library was hard coded to same location for 32 & 64 bit builds, causing VS 2008 to complain during linking. Switched to the use of $(IntDir)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16406 d0543943-73ff-0310-b7d9-9358b9ac24b2