lguest: tell git to ignore Documentation/lguest/lguest

This is the example lguest launcher binary.

Signed-off-by: Matt Kraai <kraai@ftbfs.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/Documentation/lguest/.gitignore b/Documentation/lguest/.gitignore
new file mode 100644
index 0000000..115587f
--- /dev/null
+++ b/Documentation/lguest/.gitignore
@@ -0,0 +1 @@
+lguest