SELinux: add gitignore file for mdp script

Add gitignore file for scripts/selinux/mdp/mdp.

Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/scripts/selinux/mdp/.gitignore b/scripts/selinux/mdp/.gitignore
new file mode 100644
index 0000000..654546d
--- /dev/null
+++ b/scripts/selinux/mdp/.gitignore
@@ -0,0 +1,2 @@
+# Generated file
+mdp