tools/lguest: Clean up include dir

It contains a symlinked header we use; ignore it and clean it up
on 'make clean'.

Signed-off-by: Rusty Russell <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: [e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

tools/lguest/.gitignore

···
 lguest
+include

tools/lguest/Makefile

···
 
 clean:
 	rm -f lguest
+	rm -rf include