linux: elfutils & Python required for perf only
strace: update to strace-4.8

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc: remove unneeded patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv