[Python-3000] refleaks

[Neal Norwitz]

The current refleaks for 3k are:

test_compile leaked [10, 10, 10] references, sum=30
test_io leaked [21, 21, 21] references, sum=63
test_itertools leaked [4, 4, 4] references, sum=12
test_queue leaked [995, 996, 996] references, sum=2987

When running the refleak hunter, 4 tests failed:
    test_codecs test_collections test_profile test_tcl

test_tcl can't run properly IIRC, but I think the other 3 should be
able to run with -R.

n