The current code is a little bit overcomplicated, deficient and also
possibly broken.
Issues include:
a) Not maximally optisming rpaths (e.g. a lib in usr/lib might get an
rpath of $ORIGIN/../../usr/lib)
b) The return in the middle of the for loop look suspiciously like
it might break on some binaries
c) The depth function, loops of "../" prepending and so on can
be replaced with a call to os.path.relpath
This patch cleans up the above issues.
Running binaries should result in less "../" resolutions which can't
hurt performance either.
[YOCTO #3989]
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
