On --disable-openssl, let's avoid linking the
bundled postgresql to OpenSSL by not passing down
--with-openssl to its configure script.

Also, configure stage will fail if krb5 or gssapi
are enabled as they need OpenSSL and, in any
case, --with-krb5 and --with-gssapi will not be
passed down to postgresql configure script.

Change-Id: Iaf7e944d1d8f6a018e949ece56f6d3881f1e8c46
Reviewed-on: https://gerrit.libreoffice.org/3333Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>