em-dosbox compile fix

[netpipe]

used the advice from here
https://www.mail-archive.com/emscripten-discuss@googlegroups.com/msg08678.html

opened up codeblocks imported all the src files then replaced the instances

had to modify the makefile to use .bc instead of html so a --preload-file can be attached to it.

used this line
am__append_1 = -s ASYNCIFY=1 -s EMTERPRETIFY_WHITELIST=@emterpretify.txt -s FETCH=1 --preload-file media/

was not able to compile the bc to html and have it work so the preload was added during build. for some reason it needs a folder probably as a filesystem before the packager html's can be loaded