Move RPATH adjustment to after library bundling

[gtalent]

Libraries found with the RPATH could not be found by the bundler because
the RPATH was getting changed before the bundling.

[probonopd]

Thank you very much. Do you have an example that did not work without this patch but works now?

[gtalent]

I can't share the project that this was for, but I did reproduce it here:
https://github.com/gtalent/example

[probonopd]

Thank you very much.

[M-Mueller]

This is still an issue if a library as an RPATH. For example if you have the following structure:

bin/foo
lib/libfoo.so
lib/libfoo/libbar.so

libfoo.so has an RPATH of $ORIGIN/libfoo and links against libbar.so.

linuxdeployqt will first set the RPATH of libfoo.so to $ORIGIN and then complain that ldd cannot find libbar.so. I think the order in this case should be changed as well.

[probonopd]

@M-Mueller I had attempted to fix this by adding lib/libfoo.so to LD_LIBRARY_PATH in 9a93e03 but apparently it is not working. Any help appreciated. Opening an issue for this so that it does not gets overlooked: #327