[libmix] fixed JB build issue by rewriting AVC asm code.

BZ: 47236

fixed JB build issue by rewriting AVC asm code due to gcc update.

Change-Id: Ia31aa32237f4a1e4fe59322dbf9c2e21a72d4021
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Reviewed-on: http://android.intel.com:8080/56583
Reviewed-by: Beare, Bruce J <bruce.j.beare@intel.com>
1 file changed