The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The package changes the search path for the runtime linker, but is
not part of
libc. The offending file is in
It is not okay to install libraries in a different directory and then
modify the run-time link path. Shared libraries should go into
/usr/lib. Alternatively, they can require binaries to set the
RPATH to find the library.
Without this precaution, conflicting libraries may trigger segmentation faults for what should have been a conflict in the package manager.
Refer to Debian Policy Manual section 10.2 for details.