[pitivi] m4: Ignore generated libtool m4 files

[Thibault Saunier <tsaunier src gnome org>]

commit 97b7b70e343df2803681a7feaaa4e399366bf653
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Wed Apr 9 11:26:50 2014 +0200

    m4: Ignore generated libtool m4 files

 .gitignore |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 4264f5f..03cb84c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,11 @@ depcomp
 install-sh
 libtool
 ltmain.sh
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
 missing
 pitivi/configure.py
 pitivi/coptimizations/.deps/