Switch to the @KERNEL alias
Use LTO optimization, reduces file size by ~20% (~10Kbyte)

With:
39K sbc_1.3-1_arm_cortex-a9_neon.ipk

Without:
51K sbc_1.3-1_arm_cortex-a9_neon.ipk

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

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>

contains Low Complexity Subband Coding needed for A2DP support in pulseaudio

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>