generate_BUFSIZ.sh: yet another tweak

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/.gitignore b/include/.gitignore
index 9d9b6c4..75afff9 100644
--- a/include/.gitignore
+++ b/include/.gitignore
@@ -8,3 +8,4 @@
 /NUM_APPLETS.h
 /usage_compressed.h
 /usage.h
+/common_bufsiz.h*