README.md: clean up obsolete ssh_enable instructions
ntfs-3g_ntfsprogs: dont depend on libgcrypt
samba: remove unneeded configure option

Signed-off-by: Stephan Raue <stephan@openelec.tv>
wpa_supplicant: cleanup
util-linux: update to util-linux-2.25

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libXext: update to libXext-1.3.3

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package: gnu-efi
config/graphic: remove nvidia-legacy
remove package: xf86-video-nvidia-legacy
remove package: tinyxml2
busybox: dont depend on speedcontrol
remove package: speedcontrol
remove package: yaml