ioctlent: add UAPI support

* Makefile.am (IOCTLSORT_INCLUDEDIR): Define.
(ioctlsort): Use it.
* linux/ioctlent.sh (lookup_ioctls): Look into uapi directory tree.
Strip "uapi/" prefix from output path names.
* linux/ioctlent.h.in: Regenerate from v3.9 headers.
* NEWS: Mention it.
4 files changed