fanotify: allow fanotify to be built

We disabled the ability to build fanotify in commit 7c5347733dcc4ba0ba.
This reverts that commit and allows people to build fanotify.

Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 90e3ed3..97319a8 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -118,6 +118,7 @@
 header-y += ext2_fs.h
 header-y += fadvise.h
 header-y += falloc.h
+header-y += fanotify.h
 header-y += fb.h
 header-y += fcntl.h
 header-y += fd.h