linux: fix build with testing kernels - try #2

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

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: Add some radeon patches (can be dropped with rc7 / 3.13-final)
linux: Fix applying of 3.13-rc6 patches by renaming directory