[pan2] Update .gitignore

[Petr Kovář <pmkovar src gnome org>]

commit 98bd86d64c0f30d27e53d387832bfbe34b84bd40
Author: Petr Kovar <pknbe volny cz>
Date:   Sun Jul 23 20:28:17 2017 +0200

    Update .gitignore

 .gitignore |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index d47f0f4..a4e3d97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,10 @@ config.sub
 configure
 depcomp
 .deps
+help/*/*.mo
+help/*/*.stamp
+help/*/index.docbook
+!help/C/index.docbook
 INSTALL
 install-sh
 m4/