Clean up log output of serial_debug/ic_debug
Clean up log output of serial_debug/ic_debug

Output is now sent to STDERR (to make it easier to redirect) and the
actual debug messages have been trimmed a bit.

kachick/rubinius,ngpestelos/rubinius,kachick/rubinius,kachick/rubinius,jsyeo/rubinius,sferik/rubinius,dblock/rubinius,Wirachmat/rubinius,sferik/rubinius,Azizou/rubinius,jsyeo/rubinius,dblock/rubinius,sferik/rubinius,dblock/rubinius,Azizou/rubinius,Wirachmat/rubinius,kachick/rubinius,kachick/rubinius,dblock/rubinius,ngpestelos/rubinius,sferik/rubinius,kachick/rubinius,Azizou/rubinius,Wirachmat/rubinius,Wirachmat/rubinius,jsyeo/rubinius,Azizou/rubinius,Wirachmat/rubinius,Azizou/rubinius,dblock/rubinius,sferik/rubinius,Azizou/rubinius,jsyeo/rubinius,jsyeo/rubinius,ngpestelos/rubinius,sferik/rubinius,Wirachmat/rubinius,sferik/rubinius,ngpestelos/rubinius,dblock/rubinius,ngpestelos/rubinius,kachick/rubinius,dblock/rubinius,jsyeo/rubinius,Wirachmat/rubinius,kachick/rubinius,jsyeo/rubinius,ngpestelos/rubinius,ngpestelos/rubinius,Azizou/rubinius