Makefile.modinc: compile RT components with -g for easier debugging
rtapi_app: dont hang on SEGV in cleanup

better to have a clean core dump than an unfinished cleanup.
die.comp: example comp for to demonstrate RT debugging
rtapi/rtapimodule.cc: remove - superseded by Cython-based machinekit/rtapi
global: remove unused instance name field

The integer instance id is enough.