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>
While we're at it, relocate from libs/ to utils/ as it provides executables
and change the directory name from rrdtool-1.0.x to rrdtool1 to make it match
the source package name.
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>