Import fileutils and raise more helpful error on bad MD5
Import fileutils and raise more helpful error on bad MD5

[#90531892]

Signed-off-by: Sai To Yeung <34863b63a003198e4cfe9dcefb53bc5c32a392d6@gmail.com>

cloudfoundry-incubator/compile-extensions,cloudfoundry/compile-extensions,yepengxj/compile-extensions,lanej/compile-extensions