conditionally depend on new perl-ripe package

ripe-dbase/ripe-dbase.spec

@@ -60,7 +60,7 @@ PreReq:       gnupg, glib, glib::with_threads = yes, mysql3
 BuildPreReq:  libxml, libxslt, imap, zlib, openssl
 PreReq:       libxml, libxslt, imap, zlib, openssl
 %if "%{with_extobjs}" == "yes"
-PreReq:       perl
+PreReq:       perl-ripe
 %endif
 AutoReq:      no
 AutoReqProv:  no