vyos-kernel: update config files for the latest kernel (3.13.11)

Update the three config files used for building the VyOS kernel version
to the latest default for version 3.13.11.  These defaults are
generated by running make menuconfig against 3.13.11, using the current
VyOS kernel config files.

Bug #276 http://bugzilla.vyos.net/show_bug.cgi?id=276