Add objects dirstamp to gitignore.
diff --git a/.gitignore b/.gitignore
index 8bff474..212d0e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 src/auto/if_perl.c
 src/auto/gui_gtk_gresources.c
 src/auto/gui_gtk_gresources.h
+src/objects/.dirstamp
 src/tags
 
 # We do need src/auto/configure.