Config.in: wget: default to 3 retries

Wget's builtin default of 20 retries before the backup site is used is
pretty excessive when a server is down.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Config.in

@@ -19,7 +19,7 @@ menu "Commands"
 
 config BR2_WGET
 	string "Wget command"
-	default "wget --passive-ftp -nd"
+	default "wget --passive-ftp -nd -t 3"
 
 config BR2_SVN
 	string "Subversion (svn) command"