abpilot: fix relative reference of embedded data source

With this, not only the MM wizard, but the address book data source
wizard can create relative references correctly.

Change-Id: Id7357dbcc4503ca69595992ee7ebd6b1234d386a
diff --git a/extensions/source/abpilot/datasourcehandling.cxx b/extensions/source/abpilot/datasourcehandling.cxx
index 0115775..f74c530 100644
--- a/extensions/source/abpilot/datasourcehandling.cxx
+++ b/extensions/source/abpilot/datasourcehandling.cxx
@@ -402,7 +402,8 @@ namespace abp
                    uno::Sequence<beans::PropertyValue> aSequence = comphelper::InitPropertySequence(
                    {
                        {"TargetStorage", uno::makeAny(xStorage)},
                        {"StreamRelPath", uno::makeAny(aStreamRelPath)}
                        {"StreamRelPath", uno::makeAny(aStreamRelPath)},
                        {"BaseURI", uno::makeAny(aOwnURL)}
                    });
                    xStorable->storeAsURL(sTmpName, aSequence);
                    m_pImpl->sName = sTmpName;