How the libopencv_java.so is copy to the apk when it is used the static lib type?

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I compile the jni part of my code, the camera libs ares copied, but the libopencv_java.so is ways missing. I do this copy by hand then everthing works...

my android.mk

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

OPENCV_CAMERA_MODULES:=on
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=STATIC
include ../includeOpenCV.mk
include $(OPENCV_MK_PATH)

LOCAL_MODULE    := olah
LOCAL_CFLAGS    := -Werror
LOCAL_SRC_FILES := part_jni.cpp 
LOCAL_C_INCLUDES += $(LOCAL_PATH)/../../../libs/
LOCAL_LDLIBS    += -llog -ldl -lGLESv2

include $(BUILD_SHARED_LIBRARY)