Packages such as Perl, Lua, shell scripts don't generate binary files.
Add PKGARCH:=all to them.

Signed-off-by: Deng Qingfang <dengqf6@mail2.sysu.edu.cn>

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: Nicolas Thill <nico@openwrt.org>

Signed-off-by: Amr Hassan <amr.hassan@gmail.com>