enlightenment_fm needs some files that are not in its subdirectory, but
rather are shared with enlightenment.
Possible solutions:
1) Use a non-recursive build for enlightenment_fm.
2) Factor out a convenience library containing necessary files
3) Copy over or link the files to build tree directory during build
For simplicity (3) is implemented here. Some files were not necessary
(e_prefix.c and e_sha1.c) and the others are now linked during build to
it's original location.
Lucas De Marchi