该方法是shell 和makefile组合使用
wallpapers := $(shell ls packages/apps/hyst_apps/NewBingoLauncher_C/default_wallpaper_config/)
PRODUCT_COPY_FILES += $(foreach wallpaper,$(wallpapers), $(if $(findstring customized_config,$(wallpaper)),
packages/apps/hyst_apps/NewBingoLauncher_C/default_wallpaper_config/$(wallpaper):system/$(wallpaper),
packages/apps/hyst_apps/NewBingoLauncher_C/default_wallpaper_config/$(wallpaper):system/wallpaper/$(wallpaper)))
第一句是用shell 列出目录packages/apps/hyst_apps/NewBingoLauncher_C/default_wallpaper_config/下全部文件存放到wallpapers中
第二句是makefile foreach函数循环展开wallpapers并依据须要组合复制路径