add target to run CheckXSTR

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10670 387891d4-d844-0410-90c0-e4c51a9137d3
German translation, courtesy of m!m

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10671 387891d4-d844-0410-90c0-e4c51a9137d3
do the bytes thing for now, since the other patch isn't added yet

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10672 387891d4-d844-0410-90c0-e4c51a9137d3
human-readable byte count, courtesy of m!m

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10673 387891d4-d844-0410-90c0-e4c51a9137d3