new package: add package 'popt'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'slang'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
new package: add package 'newt'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: build and install 'perf' on development builds

Signed-off-by: Stephan Raue <stephan@openelec.tv>