Conditional build of /etc/resolveconf/run support

Xandros actually uses it.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

Changelog

@@ -3,7 +3,7 @@
 	- write runlevel to utmp, needed by Printerdrake (Pascal Terjan)
 	- fix ownership of /var/run/utmp (reported by Pascal Terjan)
 	- remove obsolete code to load AGP drivers
-	- remove useless (?) /etc/resolveconf/run support (blino)
+	- conditional build of /etc/resolveconf/run support
 	- add support to /var/run/resolvconf in Mandriva (blino)
 
 O.4 (20080516)