CppunitTest_xmlsecurity_signing Unit Test Failure on 32-bit Linux

[Stephan Bergmann]

On 10/03/18 19:53, Luke Benes wrote:
>> https://gerrit.libreoffice.org/#/c/50978/ - can you try if that fixes your issue?
> 
> Unfortunately, the build is still failing with this patch. Do you want anything from the logs?

That matches my understanding (as expressed in the gerrit change), that, 
to be effective here, `gpgconf --create-socketdir` must be called with 
GNUPGHOME set to the same value it is set to during SigningTest::setUp 
in xmlsecurity/qa/unit/signing/signing.cxx.