fix version mismatch in libRXTX
upgrade to rxtx 2.2
add libraries darcs-hash:20090128215103-5007d-b9bf03e7429391abdf2a54313e436b0d711c1c2a.gz
cleanup darcs-hash:20070101030104-5007d-4a7207d203ffe93a8119d2632bb12f08651102cb.gz