where possible, use rtld_audit instead of LD_LIBRARY_PATH

[serhei]

'LD_LIBRARY_PATH considered harmful' is a common topic nowadays.

For oc-inject, LD_LIBRARY_PATH becomes a problem if the debugging tool spawns a process that needs to run in the container environment. Then the spawned process will use oc-inject libraries instead of the container environment's libraries, which is not what we want.

Probably necessary to use 'stap -c' with #2

[serhei]

Recent discussion about padding RPATH field to support RPATH editing, which might enable us to reconfigure the injected executable without too much fuss.

[serhei]

Carlos O'Donell suggested using rtld_audit (la_objsearch) to override the library search path.