busybox-full: enable some new applets

 chvt, deallocvt, fgconsole
 findfs, hwclock, lspci, nmeter
 openvt, rdate, setkeycodes, smemcap

 also enable swapon -p priority, and wc large support

 Unsymlinked: switch_root (only useful in static version)

 setkeycodes can be used to map usb keyboard special keys
 or on devices like tablet pcs with special keys

 Tested on x86 and arm targets

Change-Id: Ib0655715897f4088a81efb4ca74731b60c14ac23