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>

Lcdringer is a tool which runs on a Raspberry Pi with an LCD
display. Lcdringer connects to an XMPP server, listens for messages
sent to a particular Jabber ID, and displays these incoming messages
while playing an audible alarm. Lcdringer also responds to the messages
it receives with an indication of whether or not the audible alarm was
acknowledged with a button press.

Signed-off-by: W. Michael Petullo <mike@flyn.org>