What has been changed:
1. Fixed problem with DISTFILES, when WITH_DEMOS=yes flag is specified
2. Added patch for openrm demos. Perhaps it is a kind of bad hack,
because I used EXTRA_PATCHES to point to addition patch for demos.
I guess, that it would be better to split port in two parts, one
containing the main distribution and the other with all demos.
Let me know if this is better way.