Fixed links.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git

(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

The udev rule installed was ineffective as udev cannot run in
coexistence with procd. If needed, it should be reimplemented as
rule under /etc/hotplug.d/

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Roger D <rogerdammit@gmail.com>