Make the "python" command resemble the standard Python interpreter

[Tom Tromey]

>>>>> "Yit" == Khoo Yit Phang <khooyp@cs.umd.edu> writes:

Yit> I'm still trying to figure out how to run the testsuite and understand
Yit> the output. Is it possible to just run the Python ones, to not take so
Yit> long?

cd build/gdb
make check RUNTESTFLAGS=--directory=gdb.python

Tom