Embedded buildpath via rpath using cmake

[Maxime Chambonnet]

I don't know really where to add this bit of information in the discussion,
so I am taking the latest leaf.
The rpath trend, with or without cmake, is likely to continue as it is being
reborn by spack, nix and guix. The points made by smcv about arbitrary
code execution and reproducibility are interesting: could these be added
to the "rpath issue" wiki entry? The arguments currently in there hold in
my opinion little value.
I am reaching out on spack's slack to try and discuss the former arguments.

BR, Maxime

[1] https://wiki.debian.org/RpathIssue