Rename legacy bximage utility to 'bximage_old' and the new one to 'bximage'
TODO #1: update MSVC workspaces and documentation
TODO #2: remove legacy utilities bximage_old and bxcommit after next release


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11898 6c8e4198-a580-4521-a02f-c9ae86df1db9