[rubygem-asciidoctor] add gem to ignore file

[Dan Allen]

commit 9b3154ebe6d21107e66585e40e9ae1ff5918cff6
Author: Dan Allen <dallen at redhat.com>
Date:   Mon Mar 11 14:37:32 2013 -0600

    add gem to ignore file

 .gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index e69de29..a88f024 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+/asciidoctor-0.1.1.gem