[BUG] sysroot headers missing since r22?

```
$ ls -d /usr/local/share/android-sdk/ndk/21.3.6528147/sysroot
/usr/local/share/android-sdk/ndk/21.3.6528147/sysroot

$ ls -d /usr/local/share/android-sdk/ndk/22.0.7026061/sysroot
ls: cannot access '/usr/local/share/android-sdk/ndk/22.0.7026061/sysroot': No such file or directory
```