Also apply sanitizer.patch, because why not.

Also tweak configure to check for dlsym() instead of dlopen();
the situation described in commit
037584cf still holds on Fedora 27.

Change-Id: I446fa3e991aec06452f135ab8365702a397c441a
Reviewed-on: https://gerrit.libreoffice.org/55247Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>