Test that buildapp does not see `--dynamic-space-size`

[rpgoldman]

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Running the tests/runtime-args-test.sh on this branch (after make) as

cd tests
BUILDAPP=../buildapp ./runtime-args-test.sh

will describe the dumper object after parsing the command line, demonstrating that the dynamic-space-size slot is unset.

This branch should not be merged, but checking it out and running the test will demonstrate #36 which is the rationale for #39