9l: link with -lresolv on Linux

LGTM=rsc
R=rsc
https://codereview.appspot.com/136520044

bin/9l

diff --git a/bin/9l b/bin/9l
index d07bd89..0b57319 100755
--- a/bin/9l
+++ b/bin/9l
@@ -38,7 +38,7 @@
 *Linux*)
 	ld=${CC9:-gcc}
 	userpath=true
-	extralibs="$extralibs -lutil"
+	extralibs="$extralibs -lutil -lresolv"
 	case "${SYSVERSION:-`uname -r`}" in
 	2.6.* | 3.*)
 		extralibs="$extralibs -lpthread"

src/libndb/sysdnsquery.c

diff --git a/src/libndb/sysdnsquery.c b/src/libndb/sysdnsquery.c
index f7587ad..b9661be 100644
--- a/src/libndb/sysdnsquery.c
+++ b/src/libndb/sysdnsquery.c
@@ -9,8 +9,6 @@
 #include <ndb.h>
 #include "ndbhf.h"
 
-AUTOLIB(resolv)
-
 static void nstrcpy(char*, char*, int);
 static void mkptrname(char*, char*, int);
 static Ndbtuple *doquery(char*, char*);