[libical-glib] update m4

[Miao Yu <williamyu src gnome org>]

commit ba49cf0c38d1d194b3ff102216cc1fe25949338e
Author: william7777 <will yu aol com>
Date:   Tue Jan 13 17:50:34 2015 -0500

    update m4

 m4/.gitignore |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/m4/.gitignore b/m4/.gitignore
new file mode 100644
index 0000000..5e7d273
--- /dev/null
+++ b/m4/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore