test-in-container: Moving a test to a particular location *before* execution?

[DJ Delorie]

I was thinking "would we ever need to run ld.so in the container
anyway, and need that ld.so to be pid 1?"

Like:

/lib64/ld.so --some-flags tst-the-test.elf

but I suppose you can still exec() ld.so from the test.