Minimal header dependency updates to allow clang compiles

https://android.googlesource.com/platform/external/kernel-headers/+/dd8b932e33672d5e9916ccc1bfd3528eb21da1e9/original/uapi/linux/android_alarm.h
https://android.googlesource.com/platform/development/+/master/ndk/platforms/android-21/include/linux/binder.h
https://android.googlesource.com/platform/development/+/master/ndk/platforms/android-21/include/linux/ioprio.h
https://android.googlesource.com/platform/bionic/+/master/libc/include/sys/stat.h