Add the pentium 4 configuration. Add some command line options

Add the pentium 4 configuration.  Add some command line options
to M5 to support the python configuration stuff.

sim/main.cc:
    Make the -I option update the include path for phython as
    well as cpp
    Make the -P option pass a raw python string to the interpreter
    Make the -E option add strings to the environment
    Break up the various steps of python processing to accomidate
    multiple files and the various new options
test/genini.py:
    Make this executable

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extra : convert_revision : 6acc50d2e4367c5ceaee013db987c8a1db924df3