cxxtools: add crosscompiling patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
cxxtools: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
tntnet: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
vdr-addon: update path for tntnet libraries, add cxxtools libraries to the build

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