ignore changes to Kbuild files, they are generated

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/.gitignore b/.gitignore
index b7840e4..53bd540 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 *.o.*
 *.a
 *.s
+Kbuild
 
 #
 # Never ignore these