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>

Standard assignment is immediate expansion without any extraneous spacing, RFC822 compliant email addresses without any quotation marks and long git hashes

Signed-off-by: Stephen Walker <stephendwalker+github@gmail.com>

The original Google Code repository is not available anymore, use the
equivalent Github repository instead.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

Signed-off-by: Lars Gierth <larsg@systemli.org>

Signed-off-by: Lars Gierth <larsg@systemli.org>