./parrot with no args leaks memory

[coke]

Revision: 33777

run the newly added tools/dev/vgp with no arguments, which runs:

valgrind --suppressions=tools/dev/parrot.supp --num-callers=500 --leak-check=full --leak-resolution=high --show-reachable=yes ./parrot --leak-test

This results in the expected parrot usage message, and >20K lines of valgrind output, ending with:

==23917== LEAK SUMMARY:
==23917==    definitely lost: 0 bytes in 0 blocks.
==23917==      possibly lost: 0 bytes in 0 blocks.
==23917==    still reachable: 947,176 bytes in 1,952 blocks.
==23917==         suppressed: 0 bytes in 0 blocks.