projects/RPi/patches/linux: update RPi support patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
samba: add patch to rename 'string_free', this fixes build of kodi with if libssh-0.6.x

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libssh: update to libssh-0.6.3

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