Audit: audit watches depend on fsnotify

CONFIG_AUDIT builds audit_watches which depend on fsnotify.  Make
CONFIG_AUDIT select fsnotify.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>

init/Kconfig

@@ -307,6 +307,7 @@ config TASK_IO_ACCOUNTING
 config AUDIT
 	bool "Auditing support"
 	depends on NET
+	select FSNOTIFY
 	help
 	  Enable auditing infrastructure that can be used with another
 	  kernel subsystem, such as SELinux (which requires this for
@@ -320,8 +321,7 @@ config AUDITSYSCALL
 	help
 	  Enable low-overhead system-call auditing infrastructure that
 	  can be used independently or with another kernel subsystem,
-	  such as SELinux.  To use audit's filesystem watch feature, please
+	  such as SELinux.
-	  ensure that INOTIFY is configured.
 
 config AUDIT_TREE
 	def_bool y