f0305ec0 "Fix creation/removal of GPG socketdir"
spawns additional gpgconf processes which need the same LD_LIBRARY_PATH fix as
d15f042a "CppunitTest_xmlsecurity_signing failed
in sanitizer builds"

Change-Id: I1da9e9e459c5a584f092966923f8818f115322dc
Reviewed-on: https://gerrit.libreoffice.org/63420
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>