your Android.mk file should look like this:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_PACKAGE_NAME := SyncClient
LOCAL_CERTIFICATE := platform
LOCAL_SRC_FILES := $(call all-java-files-under, src)
LOCAL_MODULE_TAGS := user eng
LOCAL_STATIC_JAVA_LIBRARIES := common syncml client pim
#LOCAL_STATIC_JAVA_LIBRARIES := hirr4
include $(BUILD_PACKAGE)
include $(CLEAR_VARS)
#LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := hirr7:*.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := common:libs/funambol-android-common.jar syncml:libs/funambol-android-syncml.jar client:libs/funambol-se-client.jar pim:libs/funambol-se-pim.jar
include $(BUILD_MULTI_PREBUILT)
I have already test it,works fine!