The test suite is too inflexible

[mcepl]

I am trying to package lua-cjson for openSUSE and it is not easy.

Provided ./runtest.sh is very inflexible, so in order to make it work, I had to patch it, and even then I was not able to make cmake-type build working, because it has hardcoded Lua 5.1 version in it (we build for multiple Lua versions, and it would be awesome, if we could test with them; it would be good even for you, so that you may be sure about the extent of your Lua coverage).

Complete build log with all details