libmix: Add missing USE_INTEL_SECURE_AVC in Makefile

BZ: 112331

This compiler option is used to enable SecureAVC compiling

Change-Id: I384efa703c57d0a76b561a06d60ed67adab17cd9
Signed-off-by: Cheng Yao <yao.cheng@intel.com>
Reviewed-on: http://android.intel.com:8080/110978
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: cactus <cactus@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
1 file changed