find_path does not work for binaries outside package mount points

[pulkomandy]

Trying to use find_path from a binary or library (passing a symbol to identify the image) always returns "no such file or directory". This means software needs to be special-cased for "installed"/"not installed" cases, with no clear way on how to handle the latter.

I'm not sure what the proper path to return would be, however. Maybe one of:

• Use system/non-packaged
• Use a path relative to the given image location (so the app can be tested in its build directory)