Set `Wall` and address sources of reported warnings.

Signed-off-by: Tom Sullivan <tom@msbit.com.au>

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>

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

alsa-lib
glib2
libffi
libsndfile
libtorrent
speex
tcp_wrappers
etherwake
git
nfs-kernel-server
portmap
rtorrent

Signed-off-by: Peter Wagner <tripolar@gmx.at>