vlc: use @buildroot.org for the mailing list

Now that @buildroot.org is working, we should use it everywhere.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/vlc/Config.in

@@ -1,6 +1,6 @@
 if BR2_PACKAGE_VLC
 comment "vlc is known not to work in all configurations"
-comment "If you can fix it, please inform buildroot@buildroot.net"
+comment "If you can fix it, please inform buildroot@buildroot.org"
 endif
 
 config BR2_PACKAGE_VLC