1. alps\build\core\Makefile文件：（参照CUSTOM_BUILD_VERNO）
ifeq "" "$(SURPLUS_BUILD_VERNO)"
SURPLUS_BUILD_VERNO := $(BUILD_NUMBER)
SURPLUS_BUILD_VERNO := $(subst eng.$(USER).,,$(SURPLUS_BUILD_VERNO))
endif
surplus_build_desc:= $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT)-$(PLATFORM_VERSION)-$(SURPLUS_BUILD_VERNO)
$(INSTALLED_BUILD_PROP_TARGET): SURPLUS_PRIVATE_BUILD_DESC:= $(surplus_build_desc)
SURPLUS_PRIVATE_BUILD_DESC="$(SURPLUS_PRIVATE_BUILD_DESC)" \
2.\alps\build\tools\buildinfo.sh文件：（参照CUSTOM_BUILD_VERNO）
echo "ro.custom.build.version=$SURPLUS_PRIVATE_BUILD_DESC"
3.xshell编译命令：
./mk -opt=TARGET_BUILD_VARIANT=user,SURPLUS_BUILD_VERNO=v0.08 a9 new
4. alps\out\product\a9\system\build.prop文件中：
ro.custom.build.version=a9-user-4.1.2-v0.08
5.可以进入终端查看版本号，验证修改效果。