system.img 和 vendor.img 刷到手机上，文件缺失

起因是编译 aosp 后，手机进不去系统，可以接上回 https://www.v2ex.com/t/893452#reply5

排查过 dmesg 后，发现了可能的错误处

[    2.175159] init: Couldn't load property file '/system/etc/prop.default': open() failed: No such file or directory: No such file or directory
[    2.178152] init: Couldn't load property file '/system/build.prop': open() failed: No such file or directory: No such file or directory
[    2.178183] init: Couldn't load property file '/vendor/default.prop': open() failed: No such file or directory: No such file or directory
[    2.178209] init: Couldn't load property file '/vendor/build.prop': open() failed: No such file or directory: No such file or directory
...
[    2.182834] init: Parsing file /system/etc/init...
[    2.182866] init: Unable to read config file '/system/etc/init': open() failed: No such file or directory
[    2.182895] init: Parsing file /product/etc/init...
[    2.182924] init: Unable to read config file '/product/etc/init': open() failed: No such file or directory
...

后续排查:

1. 然后用 adb 查看了手机，确实没有这些配置文件。并且整个 vendor 目录下都是空的，重新make vendorimage && flash vendor还是没有文件。
2. 用simg2img把编译好的system.img和vendor.img解包后，发现里面是有这些文件的，所以文件为什么没能写入到手机里面？
3. 起初用的是fastboot flashall -w，后面换成下面的方式，还是无效

#双清
fastboot erase cache
fastboot erase userdata

#刷入 boot
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img

#刷入 system.img
fastboot flash system system.img
fastboot flash system_b system_other.img

#刷入驱动
fastboot flash vendor vendor.img

所以，现在有点麻，有没有大佬知道问题出在哪里？