linux-lts-utopic: Added CONFIG_DELL_RBTN=m

helpers/make-linux-lts-utopic

 #!/bin/sh
 #
 #    Copyright (C) 2008-2015  Ruben Rodriguez <ruben@trisquel.info>
+#    Copyright (C) 2015       Santi Rodriguez <santi@trisquel.info>
 #
 #    This program is free software; you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -59,6 +60,12 @@ CONFIG_IOSCHED_BFQ=y
 CONFIG_CGROUP_BFQIO=y
 # CONFIG_DEFAULT_BFQ is not set
 EOF
+
+#Enable Dell "airplane mode" button
+cat << EOF >> debian.master/config/config.common.trisquel
+CONFIG_DELL_RBTN=m
+EOF
+
 cp debian.master/config/config.common.trisquel debian.utopic/config/config.common.trisquel
 
 cat << EOF >> debian.master/config/i386/config.flavour.lowlatency