Install the python programs and the iceboxdb module in /usr/share/fpga-icestorm/python, instead of in /usr/bin where upstream wants to put them.
The rationale for this is that icebox imports iceboxdb, so iceboxdb needs to be findable by the python importer, but iceboxdb is not useful for any program other than icebox, so it should not be in the normal system-wide python include path.
