bacon: defconfig: Enabled USB SERIAL + WWAN + OPTION for PPP Widget

*https://play.google.com/store/apps/details?id=de.draisberghof.pppwidget&hl=en

*code taken from: https://github.com/dorimanx/Dorimanx-LG-G2-D802-Kernel/commit/7ec137b484125d2a165bb69e373ceb027e2b6e31

Change-Id: If56749bb1401d322d9efae278284d6d063de7ff5