Previous refactoring of the script moved the LDSO detection into a
file-not-exists condition, causing onyl the very first executable to
get bundled.

Solve the problem by unconditionally checking for LDSO again.

Fixes: 9030a78a ("scripts: bundle-libraries: prevent loading host locales")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>