...which only patched configure.ac not configure, and the latter does not appear
to be regenerated from the former in ExternalProject_libgpg-error

Change-Id: Id0132ed8fd8ea3a5012e4a2bc309bd5f3983ad11
Reviewed-on: https://gerrit.libreoffice.org/50954Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>