ignore generated Config file

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
diff --git a/.gitignore b/.gitignore
index 308aec6..f8c3dfc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+# locally generated
+Config
 static-syms.h
 config.*
 *.o