Enable lsof and watch

lsof is useful to look at all open files on the system
watch is useful for monitoring files in proc to see system behavior, eg watch -n1 cat /proc/interrupts
Merge pull request #2133 from vpeter4/stuff

linux: support for TechniSat SkyStar S2 card with CX24120-13Z frontend
Merge pull request #2024 from dagwieers/busybox-changes

Enable lsof and watch