added example (currently with sideeffects)

[coderofsalvation]

$ o/third_party/lua/lua.com examples/helloshell.lua | sort | uniq
 124060
 130754
 2924
 2943
 2944

more info see #315

[mrdomino]

Closing as this does not seem intended to be merged; the example stands regardless, although I'm unclear if the bug is still relevant.

[pkulchenko]

@mrdomino, this is just a minimal example for the issue discussed in #315, which still appears to be relevant. I agree that the example is sufficient though.